Take focus until quit

[duarm]

Hello, thanks for making dlauncher, my keys are not swallowed anymore because of the startup overhead added by web junk and python!

My problem is similar to #5, but that issue focus on the fact that dlauncher doesn't steal the focus, I want dlauncher to never lose it. What I would like is for dlauncher to behave like dmenu, that is, it will steal the focus, forever, until closed through ESC or by submitting an entry. I'm using a tiling window manager with sloppy focus, it's easy to move my mouse by mistake, or a window to activate, stealing the focus and disrupting the launcher workflow.