Fixed a small oversight in TidgetTopMostHelper.cs

WIDGET has to be in all-caps due to using ToUpper() on activeTitle.
Improved WidgetTopMostHelper.cs

Made the WindowInteropHelpers reusable to prevent a new element being created every second.

I also changed stayOnTop to where it iterates through all of FFXIV-APP's windows. This ensures that ALL of FFXIV-APP's windows keep the widgets on top, not just the main window + windows ending with WIDGET.
Merge pull request #6 from Bio2hazard/master

Fixed a small oversight in TidgetTopMostHelper.cs