Project Manager Can Cancel Project Builds (#1694)

* Fixed misc building and project screen bugs, added ability to cancel active builds and queued builds

* Cancelling in-progress cmake build working

Signed-off-by: nggieber <nggieber@amazon.com>

Code/Tools/ProjectManager/Platform/Windows/PAL_windows_files.cmake

@@ -7,4 +7,5 @@
 
 set(FILES
     Python_windows.cpp
+    ProjectBuilderWorker_windows.cpp
 )