Bug 7567 - Correct Filtering and Default dropdown values

Bug 7567 - Correct Filtering and Default dropdown values

In the staff client, when you went to Home -> Tools -> News
the default 'Display location' is 'All'. Everything is correctly
displayed. However, if you change the filter it filters the
table correctly, but does not set the dropdown value to match.
This patch corrects this.

TEST PLAN
---------
 1) Home -> Tools -> News
 2) Change 'Display location' value and click 'Filter'.
    - Is the 'Display location' value the same now?
      (no)
    - Are the correct values displayed?
 3) Click 'New entry'
    - Is it anything other than 'All'?
      (no, and is this correct?)
 4) Click 'Cancel'
 5) Click 'Edit' for various news items with different locations.
    - Does the 'Display location' get proper set?
      (no)
 6) Apply patch
 7) Change the 'Display location' value and click 'Filter'.
    - Does the 'Display location' value stay the same?
      (this should be correct now)
    - Are the correct values displayed?
 8) Change the 'Display location' value to 'All' and click 'Filter'.
    - Does everything display?
 9) Change the 'Display location' value and click 'Filter'.
10) Click 'New entry'
    - Does it match what the filter was?
      (should match now)
11) Click 'Cancel'
12) Click 'Edit' for various news items with different locations.
    - Does the 'Display location' get proper set?
      (this should be correct now)

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>