(feature request): add the ability to select and copy text from the code & console output views (i.e., `UICode` elements)

[s4my]

We need the ability for the users to select and copy text (via the right click menu) from any UICode element.

At times, there's a need for things like copying an address from the gdb output, or copy a long function name that we want to set a breakpoint on from the code view, ..etc. So i think this feature will come really handy, right now gf seems like a giant ready only wall.

From what i see, this seems to be a novel feature, i don't see any widget with this capability, so i don't have any pointers to anyone wanting to implement this feature, it's up to @nakst to put any pointers to anyone that want to take on this task, or even better implement it himself.