KCM Colors fix apply button always disabled
Summary:
BUG: 418604
This is similar to D27384
Test Plan:
In kdeglobals configuration file :
- Edit ColorScheme in group General to a non existing value
- Open the KCM, the default color scheme is selected with a warning message,
- Select a different scheme, the apply button stay disabled forever.
Reviewers: Plasma, ervin, bport, meven, broulik
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D27944