window-commands: Change find shortcut handling

Shortcut for find +f will now always open the search bar, instead of toggling between the states (open/close).

One of the inconsistent behaviours i always stumble upon is the search short cut. Currently it toggles between the states which is bad when searching for several words on a page. E.g. searching for one word, scrolling the page and hitting shortcut again to type further.... closes the entry. You need to press it again to do a new search.

This small change just opens the search entry instead of toggling the state. Closing is done like before with ESC key or close mark.