Bug 16398: Keep the expanded view after clearing the search form

Bug 16398: Keep the expanded view after clearing the search form

On the advanced search form, the "Clear fields" button should pass expanded_options
param to preserve the view we use.

Test plan:
- Click on more options
- Fill some fields
- Click on "Clear fields"
=> Without this patch you get the "fewer options" view
=> With this patch, you will keep the "more options" view

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>