Add function to recolor icon, fix layout issue, add layouts and its icons from bling

[thelazt16]

The theme icons for the layouts aren't the same color, so I added a function to recolor them to #ffffff (function taken from bling/layout/init.lua). I also added the icons from bling's layouts.

[thelazt16]

The 09df510 is for fixing the layout issue. I don't know if something wrong in my configs or something but for some reason the layouts won't respect any changes I made to main/layouts.lua. Any layouts I commented is still being used, either with keyboard shortcut or from click the layout button on the dock.

I checked the default config which directly interact with awful.layout.layouts to set which layout to use so I set the layout to that and pass it to layouts and with that, the problem I encountered was fixed.

Also added the layouts from bling (commented) in case people want to use it.

[thelazt16]

Scrot selection is kind of annoying to use because sometimes it will draw the selection border to the screenshot and sometimes it would just be a total mess (screenshot is exagerated because I was moving the cursor quite fast)