misc: fix some more background animations

Change-Id: Ie626cfcab08cd5ed69a0465e824238e8ce059868
Gitlab: #710

src/commoncomponents/SpinningAnimation.qml

@@ -34,12 +34,13 @@ Item {
     property real outerCutRadius: root.height / 2
     property int spinningAnimationDuration: 1000
 
+    visible: mode !== SpinningAnimation.Mode.Disabled
+
     ConicalGradient {
         id: conicalGradientOne
 
         anchors.fill: parent
 
-        visible: mode !== SpinningAnimation.Mode.Disabled
         angle: 0.0
         gradient: Gradient {
             GradientStop { position: 0.5; color: "transparent" }

src/commoncomponents/TypingDots.qml

@@ -31,7 +31,7 @@ Row {
 
     Timer {
         repeat: true
-        running: true
+        running: root.visible
         interval: JamiTheme.typingDotsAnimationInterval
 
         onTriggered: {

src/mainview/components/MessageBarTextArea.qml

@@ -87,7 +87,7 @@ JamiFlickable {
 
             SequentialAnimation on opacity {
                 loops: Animation.Infinite
-                running: visible
+                running: textArea.cursorVisible
 
                 NumberAnimation {
                     from: 1