EXT-8104 FIXED Fixed occasional inability to paste text into location input.

Changes:
- Set gEditMenuHandler to the input entry whenever it's focused, so that it can handle the Ctrl+V shortcut.
- Now pasting text into the input field triggers rebuilding the dropdown matches list, as if the user has typed the text.

Reviewed by Sergey Litovchuk at https://codereview.productengine.com/secondlife/r/691/

--HG--
branch : product-engine