Cross platform image copy system, icons for tabs.

+ Fixing issue with unreadable text color in the about dialog.

qml/About.qml

@@ -40,7 +40,7 @@ D.Dialog {
         anchors.topMargin: 10
     }
     
-    Text {
+    Label {
         id: appName
         anchors.top: logo.bottom
         anchors.left: parent.left
@@ -52,7 +52,7 @@ D.Dialog {
         text: "Logarithmic Plotter v" + Helper.getVersion() 
     }
     
-    Text {
+    Label {
         id: description
         anchors.top: appName.bottom
         anchors.left: parent.left
@@ -64,7 +64,7 @@ D.Dialog {
         text: "Create graphs with logarithm scales."
     }
     
-    Text {
+    Label {
         id: debugInfos
         anchors.top: description.bottom
         anchors.left: parent.left
@@ -76,7 +76,7 @@ D.Dialog {
         text: Helper.getDebugInfos() 
     }
     
-    Text {
+    Label {
         id: copyrightInfos
         anchors.top: debugInfos.bottom
         anchors.horizontalCenter: parent.horizontalCenter
@@ -85,7 +85,7 @@ D.Dialog {
         wrapMode: Text.WordWrap
         textFormat: Text.RichText
         font.pixelSize: 13
-        text: "Copyright (C) 2021  Ad5001 &lt;mail@ad5001.eu&gt;<br>
+        text: "Copyright © 2021  Ad5001 &lt;mail@ad5001.eu&gt;<br>
 <br>
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.<br>
 <br>

qml/LogGraph.qml

@@ -57,12 +57,21 @@ ApplicationWindow {
             anchors.top: parent.top
             TabButton {
                 text: qsTr("Objects")
+                icon.name: 'polygon-add-nodes'
+                icon.color: sysPalette.windowText
+                //height: 24
             }
             TabButton {
                 text: qsTr("Settings")
+                icon.name: 'preferences-system'
+                icon.color: sysPalette.windowText
+                //height: 24
             }
             TabButton {
                 text: qsTr("History")
+                icon.name: 'history'
+                icon.color: sysPalette.windowText
+                //height: 24
             }
         }
         

qml/ObjectLists.qml

@@ -438,7 +438,7 @@ ListView {
                     icon.name: modelData
                     icon.width: 24
                     icon.height: 24
-                    icon.color: sysPalette.windowText
+                    icon.color: 'white'//sysPalette.windowText
                     
                     onClicked: {
                         var newObj = Objects.createNewRegisteredObject(modelData)