React UI: tags support

[ActiveChooN]

Added tags support to new UI

Now you can add tags to annotation with button on the sidebar

And edit it with objects panel like other objects

TODO:

• Fix filters
• Fix Ctrl+C N shortcuts
• Add color changing
• Fix objects hiding
• add tags drawing to cvat-canvas

[bsekachev]

Hi, some found issues:

1. Probably we should not display buttons "to background", "to foreground" at all for tags.
2. Filter doesn't work
3. Changing color for a tag doesn't work
4. N shortcut to create new tag doesn't work
5. Ctrl+C, Ctrl+B shortcuts don't work
6. Hide/show all button doesn't work correctly (try to create tag and hide/show all)
7. Left/Right arrow buttons (search with a filter) don't work correctly if there is a tag on a found frame (I mean next or previous)

[ActiveChooN]

Changing color for a tag doesn't work

Tags are not displayed on canvas so maybe no color changer is needed

[ActiveChooN]

@bsekachev fixed issues, can you make review again?

[bsekachev]

Sure.
A couple of issues with copy:

1. Ctrl + V works only once after Ctrl + C. Is it expected?
2. It seems to be attributes aren't copied from source tag.

[vinorth-v]

Hello, can you give an estimation of when the tags would be merged? One week? One month? more?

Thank you,
Best regards

[ActiveChooN]

@vinorth05, thank you for your interest in CVAT project. I guess this PR will be finished and merged in few days