[FEATURE REQUEST] Allow Grepping Through Opened Tabs/Grepping Through Current Window's Tabs

[senyoagawu]

Problem: there are times where i'll have 50 or so tabs open with stuff that i skimmed. then remember something random in some tab somewhere, and then have to start the painful process of switching to each tab and /to search.

Solution: User should be able to bring up a Search-Through-Tabs omni-bar that queries all open tabs (or all the tabs in current window) and returns a list of tabs matching that query. would be super awesome if this omnibar could also take in regex.

(sorry not a bug, but i think it'ld be cool)