[kcms/style] Fix setting to default and apply button enablement (!2068) · Merge requests · Plasma / Plasma Workspace

Track the selected GTK theme in the model only. This fixes setting to default when the GTK pages was never opened

Override isSaveNeeded instead of calling setNeedsSave, this fixes the apply button enablement

(cherry picked from commit 0536cf41)

[kcms/style] Fix setting to default and apply button enablement