Merge pull request #62 from jonwd7/alpha/1.2a2

Alpha/1.2a2
[Fix] Qt5 port regression with NifModel and KfmModel

Basically, I placed the endResetModel() too far down in the clear()
functions because I wasn't aware that the entire clear function was not
meant to be all "reset" code.

Technically the stuff after endResetModel() should be put into its own
function...
Merge branch 'fix/qt5port-regression' into alpha/1.2a2