In help>System information (I haven't tried it elsewhere) pressing ctrl+a doesn't do anything, but it should select everything.
That was discussed already somewere long time ago. Ctrl+V, Ctrl+C also don't work (mb it's working now, but IIRC wasn't few days ago)
We'll add Ctrl-A support in the next client.
Nothing extracted yet.
In help>System information (I haven't tried it elsewhere) pressing ctrl+a doesn't do anything, but it should select everything.