Import QtGraphicalEffects 1.0 instead of 1.2 to fix dependency issue.

Summary:
Fixes an issue where the shell plasmoid fails to load when QtGraphicalEffects 1.2 is missing from the system. This causes various issues like the task manager applet failing to load.

BUG: 406818

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D20774

plasmoid/package/contents/ui/taskslayout/ScrollEdgeShadows.qml

@@ -17,7 +17,7 @@
 
 import QtQuick 2.7
 import QtQuick.Controls 1.4
-import QtGraphicalEffects 1.2
+import QtGraphicalEffects 1.0
 
 import org.kde.plasma.plasmoid 2.0
 import org.kde.plasma.core 2.0 as PlasmaCore

plasmoid/package/contents/ui/taskslayout/ScrollOpacityMask.qml

@@ -17,7 +17,7 @@
 
 import QtQuick 2.7
 import QtQuick.Controls 1.4
-import QtGraphicalEffects 1.2
+import QtGraphicalEffects 1.0
 
 import org.kde.plasma.plasmoid 2.0
 import org.kde.plasma.core 2.0 as PlasmaCore