Fix deleting running time entries.

When deleting a running time entry it needs to be stopped before
deleting it. If not, weirt things will start happening.
Add deletion handling logic to AllTimeEntriesView.

Make sure that deleted time entries would be removed from the view.
Add context action bar to log list view.

The LogTimeEntriesListFragment now displays a context action bar when
long pressing on the entries. The delete option is implemented, editing
should navigate to currently not-existing edit time entry activity.
Add delete confirm dialog.
Merge branch 'roosmaa-delete-ui'

Implemented support for deleting time entries in the log view.