communities: search fixes
- Fixes search form to include search term.
- Adds number of results found to template.
- Fixes css classes used for icons.
- Rearranges search and sort widgets.
- Fixes search to search for terms in both title and description as at any location and not only the beginning of the text.
Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>