I like this idea but why don't use the same search ui than the resource tab ?
Another idea for solving elements search problem, is a "bookmark" bar, where we can click and go to bookmarked element (or resource). On large project with a lot of chunks and stuff using the tree can be a pain and in my experience i often focus on some group of element when building page.
CTRL+SHIFT+U - Clear Cache
CTRL+SHIFT+H - Hiding Heft Panel
CTRL+SHIFT+N - Fast Create Resource
CTRL+ALT+P - Preview Recource (in edit resorce window)
CTRL+ALT+S - Save