Status: Filter multiple path criteria inputs

The files filtering in status widget was only accepting single path
criteria. This is a bit inconvenience when you want to filter on
multiple path filter criteria.

This change will add ability to filter the files based on multiple
criteria separated by a space.

Reported-by: hrj
Signed-off-by: Minarto Margoliono <lie.r.min.g@gmail.com>
Status: Add autocompletion for the filter

To use the filter in status widget, a user need to know the exact path
they want to filter. This is a bit user unfriendly as the user might not
always remember the exact path they want to filter on.

This change will add autocomplete pop-up for filter in status widget. It
will autocomplete to both folders path and files path.

Reported-by: hrj
Signed-off-by: Minarto Margoliono <lie.r.min.g@gmail.com>