Copy all the label name and color related stuff from pixel classification, implement removing labels
fixes #323
remove fillMissingSlices from general object classification workflow
default object features get calculated even if user has not selected any features.
check size of feature matrix
attempt to make thresholdTwoLevels work for o5ified 2d images
cleanup: delete superfluous copies of viewerControl.ui and fix tool tip
disable live predict until features are available
lapl feature removes z-axis of shape 1. close #325.
fixed bug in object dialog
broadcast Features slot
made object extraction non-interactive mode work again
thresholding now works on data with time (with akreshuk)
tracking: made divisions optional
tracking workflow includes thresholding applet now to start directly from predictions rather than segmentation
LayerViewerGui: allow the slot to specify channel display
do not check feature matrix size until all have been assembled
if no labels exist, ignore that image during training
display objects with missing features as an additional black overlay
remove brush size from drawer