OmniSearch: popup search results instead of requiring them to be weaved into template

[seiyria]

This is needed in the following locations:

• quick import
• promotion management

This would close #8 if it were globally implemented (it should be, and showSearchResults should be removed, probably, because it can be confusing - however, search results should still be emitted and handled correctly). The popup should be optional and should only show up if there is more than one search result, and it would allow users to choose a result out of the popup.

[seiyria]

Update: showSearchResults cannot be removed because it is still useful for pages like the inventory page. Either way, most things will use the new method of doing things.