[applets/digitalclock] Fix timezone filter
Sometimes, the filter in the timezone selector would only show those items already selected. Initialize the property 'showOnlyChecked' on the proxy model so it doesn't depend on random initialization
Sometimes, the filter in the timezone selector would only show those items already selected. Initialize the property 'showOnlyChecked' on the proxy model so it doesn't depend on random initialization
mentioned in commit 07156230
·mentioned in commit 07156230