fmbtwindows: fix refreshView area on some platforms
fmbtwindows: fix refreshView area on some platforms

On some platforms UIAutomation BoundingRectangleProperty numbers are
separated by semicolons, and on some platforms by commas. This patch
adds support for comma-separated numbers.

01org/fMBT,yoonkiss/fMBT,violep01/fMBT,mixu-/fMBT,yoonkiss/fMBT,mixu-/fMBT,mixu-/fMBT,violep01/fMBT,yoonkiss/fMBT,01org/fMBT,violep01/fMBT,yoonkiss/fMBT,violep01/fMBT,mixu-/fMBT,01org/fMBT,01org/fMBT,yoonkiss/fMBT,01org/fMBT,mixu-/fMBT,violep01/fMBT