Select the text in the textbox once it gets focus, for a more user-friendly browsing experience.
Remove the lParam parameter in SendKeyEvent(), since we didn't use it. Unused parameters are evil and should be removed asap, with no mercy.
Fixed OnPrevKey* handling, so that the arrow keys and Tab work as they should, within the web browser control.
Fixed a bug which has been bothering me a bit in the CEF1-based branch: Alt-F4 shouldn't be marked as Handled, since that makes it impossible to shut down the app by pressing Alt-F4...
Fixed up the watermark opacity to look much, much cooler.