Error after removing a tag

[mkostiv]

Steps to reproduce:

1. Add a tag to an image
2. Try to remove tag -> Crash
3. Reload the page, select the frame with a tag you previously tried to remove
4. Hover the mouse over the tag -> Crash

TypeError
Cannot read property 'removeClass' of undefined

TypeError: Cannot read property 'removeClass' of undefined
at Mu.deactivateShape (http://34.91.5.56:8080/cvat-ui.min.js:72:1383456)
at Mu.deactivate (http://34.91.5.56:8080/cvat-ui.min.js:72:1383969)
at Mu.activate (http://34.91.5.56:8080/cvat-ui.min.js:72:1386548)
at Mu.notify (http://34.91.5.56:8080/cvat-ui.min.js:72:1376400)
at Cc.notify (http://34.91.5.56:8080/cvat-ui.min.js:72:1293622)
at Cc.activate (http://34.91.5.56:8080/cvat-ui.min.js:72:1296706)
at Lu.activate (http://34.91.5.56:8080/cvat-ui.min.js:72:1391016)
at od.componentDidUpdate (http://34.91.5.56:8080/cvat-ui.min.js:72:1424991)
at yl (http://34.91.5.56:8080/cvat-ui.min.js:43:100837)
at t.unstable_runWithPriority (http://34.91.5.56:8080/cvat-ui.min.js:51:3465)

[mkostiv]

git describe 0.2.0-706-g6566e4a

[bsekachev]

Also found the issue. It is enough just to deactivate a tag.

@ActiveChooN could you please look into this?

[ActiveChooN]

@bsekachev, maybe it's good idea to add activated shape id checking in cvat-canvas in activation method, is it?