Rename the Color singleton to avoid the Qt 6.12 clash

shell/Ui/KeyboardPanel.qml

@@ -44,7 +44,7 @@ PanelWindow {
   property int padding: Style.spacing.popupPadding
   property int contentWidth: Style.space(280)
   property int contentHeight: Style.space(200)
-  property var borderSpec: Border.surfaceSpec("popups", "border", Color.popups.border, Math.max(1, Style.space(2)))
+  property var borderSpec: Border.surfaceSpec("popups", "border", Colors.popups.border, Math.max(1, Style.space(2)))
   property bool centerOnBar: false
   property bool open: false
   property int gap: Style.gapsOut  // distance between bar edge and panel
@@ -382,7 +382,7 @@ PanelWindow {
     y: root.cardOrigin.y
     width: root.contentWidth
     height: root.contentHeight
-    color: Color.popups.background
+    color: Colors.popups.background
     borderSpec: root.borderSpec
     padding: root.padding
     radius: Style.cornerRadius