smartlist: fix wrong contact selection

- unselect smartlist before contact selection. This makes possible selecting the same index when smartlist changes, i. e., when searching contacts or switching to invitations menu

Gitlab: #96
Change-Id: Id402389a3b80771f37946323d4112a5324612d33

src/mainview/components/ConversationSmartListViewItemDelegate.qml

@@ -198,6 +198,7 @@ ItemDelegate {
                 userProfile.contactPicBase64 = Picture
                 smartListContextMenu.openMenu()
             } else if (mouse.button === Qt.LeftButton) {
+                conversationSmartListView.currentIndex = -1
                 conversationSmartListView.currentIndex = index
             }
         }