Open declaration in a new window without reseting search menu results

[EugeneManushkin]

Suggested by @sakkada and @dmitrychepel

It will be a very usefull, for cases, when you search declaration of something and don't where particular source located, to have possibility to open new editor without closing menu of finded results. How I see it. I want to see source of some method, but this method released in 10 places all over the project. I press AltW (in my conf it just call plugin menu), select first item Open declaration, further I filter all available strings by some pattern (for example I search all files in some dirname - different declarations of same method in different backends/drivers/etc.) and next I want to look at each of them. Instead of pressing Enter and closign menu on opening new editor instance with selected declaration, I press F3 (it usefull, because I can place my left hand on Esc and F3 buttons simultaneously) and see new editor window, do something, pressing F2 to save or Esc, may be only Esc, it doesn't matter, and return to previous editor window with onepen menu. And I do not need to open plugin again and input new filter string, if required.

[EugeneManushkin]

Implemented in build 2.1.0.34