Add widgetRemoveEnd event

[Fohlen]

This PR introduces a widgetRemoveEnd event which can be quiet handy in the following set up

• one has a widget that is occasionally added and removed (depending on what table is sorted)
• the sort end event can happen after the widget has been removed and initialized
• this can result in the old table being used for the widget

=> using a widgetRemoveEnd event makes it possible to intercept the above behavoir.
Sorry for the big diff. It's only 2 lines actually, but grunt rewrote about 97%, if you need to know the exact changes, let me know.

[Mottie]

Hi @Fohlen!

I can add ?w=1 to the url to ignore all the whitespace changes...

1. Please put all my tabs back. I love my tabs!
2. The testing function has this addition assert.equal( ts, 'removeWidgetEnd fired' );. I didn't try this, but ts is the variable containing the tablesorter object $.tablesorter. I don't see how that could be equal.

[Fohlen]

Hey @Mottie

1. That must have been Atom! If you urge, I can convert spaces -> tabs again
2. uh. I'm not really introduced into QUnit and didn't understand how it tests the events. However I verified that it works in Chrome. Mind updating the unit test?

[Mottie]

I think it might be easier for me to add this enhancement then... I'll get to it when I get some time, probably later this afternoon.

[Mottie]

Added in v2.29.0 - see docs.