Can't break a waiting "Wait" step

[kinook]

Filenames in the Wait action must be specified as an absolute path+filename (i.e., %PROJDIR%\dummy.xyz, %TEMP%\dummy.xyz, c:\path\to\dummy.xyz, etc.). The Wait action should fail if a path is not specified, which we'll fix, but one way to exit the hung build is to use File | Exit (answer Yes to abort the build), then choose File | Exit again to force exit the build.