v2.0.481-SNAPSHOT - RC1

See and use previous Release Notes of v2.0.458-SNAPSHOT.
This is a pre-release for testing. This is ReleaseCandidate 1.
Implemented more feedback.
Adaptions:

🗺️ Project Mapping

• In the import dialog, a checkbox now indicates if a project is already mapped.
• Re-enabled the invalid mapping popup (previously disabled by accident).
  It appears when HEIMAT tasks are mapped but no longer exist. These mappings will be deleted upon Save.

🔄 Project Sync

• "Sync" is now automatically unchecked if a time entry in HEIMAT is already within ±15 minutes of the KeepTime tracked time.
• After syncing, a link to the synced day is now shown. A countdown has also been added before the sync window closes automatically. Also fixed styling of this view.
• Fixed an issue where "sync" was disabled for time entries that existed in HEIMAT but not in KeepTime (even if the project was mapped).
  With the recent feature allowing sync of unmapped HEIMAT projects, this is no longer blocked.

🎨 UI & Styling

• The report table now also uses the updated, modern styles.

🛠️ Bugfixes

• QuickFix for #170: Active work was only shown in the Report & Sync view after auto-save. This is now fixed (a little hacky).