versionofdialog: define default button

Change-Id: I2636555d9351b59572eebcf4d3f420da33674e3a
pivottablelayoutdialog: define default button

Change-Id: Ica4bc2a52e7351899a5741086c6db299caa5ed16
iahndl: do lazy replacement

There's no need for such a bloat method to replace just two vars.

Change-Id: I235d092b89160c2599a41e1046a15475b8ba433c