Fix QML in Qt6

This means having two versions of everything, the idea is to migrate to Qt6, test that everything works fine and drop Qt5 as soon as possible.

YACReaderLibrary/qml/InfoFavorites6.qml

@@ -0,0 +1,32 @@
+import QtQuick 2.15
+
+import Qt5Compat.GraphicalEffects
+
+Item {
+    width: 20
+    height: 20
+
+    property bool active
+
+    signal activeChangedByUser(bool active)
+
+    MouseArea {
+        anchors.fill: favorites_button_compact
+        onClicked: {
+            activeChangedByUser(!active);
+        }
+    }
+
+    Image {
+        anchors.centerIn: parent
+        id: favorites_button_compact
+        source: "info-favorites.png"
+    }
+
+    ColorOverlay {
+        anchors.fill: favorites_button_compact
+        source: favorites_button_compact
+        color: active ? favCheckedColor : favUncheckedColor
+    }
+}
+