Creation mode switching bugfix

[BryonLewis]

More explicitly determines what changes will cause disabling the current editing process. Changes to the track type or other values shouldn't cause the in process annotation to disable and reset. Changes to the editType, selectedTrack or selectedKey will cause the editAnnotationLayer to disable and switch to a different mode.

I'm using the existing changeData stuff for line creation to skip updates when data not relevant to the current editing Type (line,rectnagle, poly) or selectedKey isn't changed. So if track types are changed it won't kick it out of editing mode.

I found another issue in here related to continuous head/tail mode that has to do with rectangleLayer selecting the previously created mode on mouse release right after creation causing the older trackId to be reselected instead of the new one.

[subdavis]

Sorry for the delay. I'm really trying to get my head back around how these parts of the code work again, beyond just what these small changes do.

[BryonLewis]

Sorry for the delay. I'm really trying to get my head back around how these parts of the code work again, beyond just what these small changes do.

I fully understand. It was hurting my head the other day even attempting to wrap my mind about the data flow during the annotation editing/creation process and how it can be interrupted by changing annotation Types, Track Types or other reactive changes that can cause a call to updateLayers inside of the LayerManager.