Few simple user interface improvements for the search tab

Few simple user interface improvements for the search tab

These should be relatively minor enhancements, but would give a nice boost to user flow and productivity:
  1. When clicking on the Search tab, automatically put the mouse cursor in the search field
  2. Use the Esc. key as the equivalent of clicking the "X" icon, to close a panel (like the Advanced Search panel) or modal dialog 
Cheers