ui: update icons

- use same set of icons than in other clients
- use predefined sizes for buttons and icon padding
   large button: 56x56, 16 padding
   medium button: 40x40, 8 padding
   small button: 30x30, 6 padding

Tuleap: #354
Change-Id: Ic3a01665e666419ae10a9f36955669149d8e5c01

src/views/IconButton.mm

@@ -33,7 +33,7 @@
     }
 
     if (self.imageInsets == 0)
-        self.imageInsets = 5.0f;
+        self.imageInsets = 8.0f;
 }
 
 - (void)drawRect:(NSRect)dirtyRect

ui/Base.lproj/Conversation.xib

 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="9531" systemVersion="15B42" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="9532" systemVersion="15D21" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="9531"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="9532"/>
     </dependencies>
     <objects>
         <customObject id="-2" userLabel="File's Owner" customClass="ConversationVC">
@@ -148,9 +148,6 @@
                         <font key="font" metaFont="system"/>
                     </buttonCell>
                     <userDefinedRuntimeAttributes>
-                        <userDefinedRuntimeAttribute type="number" keyPath="imageInsets">
-                            <integer key="value" value="8"/>
-                        </userDefinedRuntimeAttribute>
                         <userDefinedRuntimeAttribute type="color" keyPath="highlightColor">
                             <color key="value" red="0.16862745100000001" green="0.70588235290000001" blue="0.78823529410000004" alpha="1" colorSpace="calibratedRGB"/>
                         </userDefinedRuntimeAttribute>
@@ -206,26 +203,6 @@
                                 <action selector="placeCall:" target="-2" id="2h9-fM-gof"/>
                             </connections>
                         </button>
-                        <button verticalHuggingPriority="750" ambiguous="YES" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="UJf-cF-RAo" customClass="IconButton">
-                            <rect key="frame" x="698" y="5" width="40" height="40"/>
-                            <constraints>
-                                <constraint firstAttribute="width" constant="40" id="TmF-ip-m4C"/>
-                                <constraint firstAttribute="height" constant="40" id="rbQ-lE-sAq"/>
-                            </constraints>
-                            <buttonCell key="cell" type="square" bezelStyle="shadowlessSquare" image="ic_action_send" imagePosition="overlaps" alignment="center" transparent="YES" imageScaling="proportionallyDown" inset="2" id="s6a-eK-t3T">
-                                <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
-                                <font key="font" metaFont="system"/>
-                            </buttonCell>
-                            <userDefinedRuntimeAttributes>
-                                <userDefinedRuntimeAttribute type="number" keyPath="imageInsets">
-                                    <integer key="value" value="8"/>
-                                </userDefinedRuntimeAttribute>
-                            </userDefinedRuntimeAttributes>
-                            <connections>
-                                <action selector="sendMessage:" target="-2" id="5Cf-jA-eJM"/>
-                                <binding destination="-2" name="enabled" keyPath="self.message.length" id="ZmZ-2N-CPX"/>
-                            </connections>
-                        </button>
                         <textField verticalHuggingPriority="750" ambiguous="YES" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="bsk-Gj-qQ2">
                             <rect key="frame" x="68" y="5" width="622" height="40"/>
                             <constraints>
@@ -248,6 +225,21 @@
                                 <outlet property="delegate" destination="-2" id="2u2-D4-htz"/>
                             </connections>
                         </textField>
+                        <button verticalHuggingPriority="750" ambiguous="YES" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="UJf-cF-RAo" customClass="IconButton">
+                            <rect key="frame" x="698" y="5" width="40" height="40"/>
+                            <constraints>
+                                <constraint firstAttribute="width" constant="40" id="TmF-ip-m4C"/>
+                                <constraint firstAttribute="height" constant="40" id="rbQ-lE-sAq"/>
+                            </constraints>
+                            <buttonCell key="cell" type="square" bezelStyle="shadowlessSquare" image="ic_action_send" imagePosition="overlaps" alignment="center" transparent="YES" imageScaling="proportionallyDown" inset="2" id="s6a-eK-t3T">
+                                <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
+                                <font key="font" metaFont="system"/>
+                            </buttonCell>
+                            <connections>
+                                <action selector="sendMessage:" target="-2" id="5Cf-jA-eJM"/>
+                                <binding destination="-2" name="enabled" keyPath="self.message.length" id="ZmZ-2N-CPX"/>
+                            </connections>
+                        </button>
                     </subviews>
                     <constraints>
                         <constraint firstItem="cFH-d7-Erh" firstAttribute="top" secondItem="Rth-di-Tls" secondAttribute="top" constant="5" id="2zJ-2h-dLg"/>