swarmdetailspanel: show selected color for ColorDialog

Change-Id: I2ccacd54479f5915e6032a5f39fdd8e997e759f6
GitLab: #1137

src/app/mainview/components/SwarmDetailsPanel.qml

@@ -222,6 +222,7 @@ Rectangle {
             ColorDialog {
                 id: colorDialog
                 title: JamiStrings.chooseAColor
+                currentColor: CurrentConversation.color
                 onAccepted: {
                     CurrentConversation.setPreference("color", colorDialog.color);
                     this.destroy();