[sddm-theme/lock screen] Fix "unable to assign [undefined]" error

Summary:
This patch fixes the "Unable to assign [undefined] to QColor" and "Unable to assign [undefined] to int" errors that occur in UserDelegate.qml (188:9, 187:9) and Clock.qml (53:13, 52:13, 60:13, 59:13), visible in sddm-greeter's output.

It does so by resetting the label style to Normal (instead of undefined). Once Text.Normal is set, the outline color is set as transparent (but that doesn't matter since there's no outline to begin with).

Test Plan: Works the same, looks the same, no error in output.

Reviewers: #vdg, #plasma, broulik

Reviewed By: #plasma, broulik

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D19577

lookandfeel/contents/components/Clock.qml

@@ -44,20 +44,20 @@ Item {
         spread: 0.3
         color: "black" // matches Breeze window decoration and desktopcontainment
     }
-    
+
     ColumnLayout {
         id: clock
         Label {
             text: Qt.formatTime(timeSource.data["Local"]["DateTime"])
-            style: softwareRendering ? Text.Outline : undefined
-            styleColor: softwareRendering ? ColorScope.backgroundColor : undefined
+            style: softwareRendering ? Text.Outline : Text.Normal
+            styleColor: softwareRendering ? ColorScope.backgroundColor : "transparent" //no outline, doesn't matter
             font.pointSize: 48
             Layout.alignment: Qt.AlignHCenter
         }
         Label {
             text: Qt.formatDate(timeSource.data["Local"]["DateTime"], Qt.DefaultLocaleLongDate)
-            style: softwareRendering ? Text.Outline : undefined
-            styleColor: softwareRendering ? ColorScope.backgroundColor : undefined
+            style: softwareRendering ? Text.Outline : Text.Normal
+            styleColor: softwareRendering ? ColorScope.backgroundColor : "transparent" //no outline, doesn't matter
             font.pointSize: 24
             Layout.alignment: Qt.AlignHCenter
         }

lookandfeel/contents/components/UserDelegate.qml

@@ -183,8 +183,8 @@ Item {
         height: implicitHeight // work around stupid bug in Plasma Components that sets the height
         width: constrainText ? parent.width : implicitWidth
         text: wrapper.name
-        style: softwareRendering ? Text.Outline : undefined
-        styleColor: softwareRendering ? ColorScope.backgroundColor : undefined
+        style: softwareRendering ? Text.Outline : Text.Normal
+        styleColor: softwareRendering ? ColorScope.backgroundColor : "transparent" //no outline, doesn't matter
         elide: Text.ElideRight
         horizontalAlignment: Text.AlignHCenter
         //make an indication that this has active focus, this only happens when reached with keyboard navigation