[TECHNICAL-SUPPORT] LPS-37546 Search Portlet - Multiple searches can be sumitted upon clicking several times on the search icon in the main view

Hi Tamás,

Read the full commit message of the 1st commit and let me know if you've any concerns.
With this change to the util.js, you can see that the search icon is visually (and programmatically) disabled after the 1st submit.

Tested on 
- IE7/8/9
- FF 21.0 (For Canonical Ubuntu)
- Google Chrome 28.0.1500.52

Regards,
Tibor