Replace IModelView with IDataView.
Convert Joey to new data views.
Add date grouping to AllTimeEntriesView.
Dispose of data views in base adapter.
Convert log adapter to new log view behaviour.
Add displaying of total duration.
Remove redundant TotalDuration.
Add batch updates to all time entries view.
Move projects and tasks data logic to a data view.
Migrate project adapter to ProjectAndTaskView.
Remove debug delay.
Fix infinite recursion.
Cache count value in projects and tasks view.
Cache count value in expanded project view.
Merge branch 'roosmaa-modelviews'

Closes #151
Closes #130
Closes #125