Add SettingsUtils utility class

Authored by broulik on Sep 24 2019, 1:48 PM.

Description

Add SettingsUtils utility class

For reading and writing of settings.
Promise-based API taking into account defaults values.
Also drop unused loadSettings callback in options page.

Differential Revision: https://phabricator.kde.org/D24165

Details

Committed
broulikSep 24 2019, 1:48 PM
Differential Revision
D24165: Add SettingsUtil utility class
Parents
R856:bc9d26dacf66: GIT_SILENT made messages (after extraction)
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