Allow Ctrl+Arrow text nav to jump to camel-case word boundaries

[stacktracer]

Ctrl+Arrow moves the cursor left or right by a word. In Eclipse's Java editor, this can be made to honor camel-case words (Prefs -> Java -> Editor -> Smart caret positioning in Java names). Would be great to have that behavior in the Typescript editor.

[derekcicerone-zz]

Sounds like a good idea - feel free to send over a pull request for this (I have no idea how hard it would be).