Restore default filters button overrides 'Set as default filter' user settings

Users can choose a default filter for the task inbox screen from pre-defined filters in 'Saved filters' dock.

When users alter the current filter by adding another filtering option and they press 'Restore default filters' button, the previously defined default option is removed. After that another filter is set as default (probably the first from Saved filters dock).

This way, user can't revoke changes made to the (explicitly set) default filter in other way than navigating away and back to the screen.

In my view following should happen:

1. the user preference should be kept - i.e. retain the defaults set by user, just remove the changes
2. 'Active filters' toolbar should be updated immediately