Select a word/line by clicking/double-clicking on the text

[1ndahous3]

Useful feature in most text viewers, editors, IDEs, etc.

Comparison of Visual Studio/Sublime Text/RAD Debugger:

[1ndahous3]

Similar to #45, but in text.

[mmozeiko]

On TODO list here: https://github.com/EpicGames/raddebugger/blob/d172b3a059af35937b9cd7be5d73ceb35084c591/src/raddbg/raddbg.h#L182

[ryanfleury]

Done as of 8c5c0be. This change is on the dev branch currently but will be in master shortly, and the next release.