MP1-4180 : Load / start PowerScheduler if PS++ was enabled in older versions
MP1-4191: Enable the "Apply" button for all settings

ProtoShare Designs
MP1-4194 : Handle correctly "ask confirmation when stopping timeshift" when OSD is displayed
PS is enabled in MP Configuration too
Merge branch 'master' into MP1-4180_PS_is_not_enabled_though_PS++_was_enabled
Merge remote-tracking branch 'remotes/origin/MP1-4194-BUG-Stop_Timeshifting_dialog_shows_up_with_option_disabled_when_Info_screen_is_open'
Merge remote-tracking branch 'remotes/origin/MP1-4191_Enable_Apply_button_in_PS_Config_for_all_settings'
Merge remote-tracking branch 'remotes/origin/MP1-4180_PS_is_not_enabled_though_PS++_was_enabled'