Sorting with filters broken

[Querschlag]

I discovered that the list get's reseted when sorting entries after applying filters.

Steps to reproduce:

1. Set a filter
2. Sort filtered list using "s"

Expected behavior:
List of items matching the filter should be sorted.

Actual behavior:
Filter get's reset and whole list of entries get sorted.
Filter still marked as applied even though all items are visible.

[colinsullivan]

Also the filter is reset when simply refreshing the task list. Although the filter is still selected in the filters pane.