fixed some issues with the css related to focus and nofocus

The themeColor css property was modified in a bunch of places, the only thing this changes is the focus rectangle colour. I've changed them all back to haloBlue which is the default.

There was a property set for resizeHandleXOffset, I don't really know why this was modified because it just made the cursor jump away. I removed that.

I also added in borderAlpha and backgroundAlpha changes for when a window gains or loses focus, much easier to see what currently has focus in the client.

I also modified the Help link's text colour when not rolled over. It used to be the same colour as the background and blended in so I changed it to white. It's now much easier to see.