Front refactoring

[githubering182]

- refactor into ts version

- features are stabilized:

clean up code (repos, utils, css rules, components)
golas/stats and maybe more have the same radios
make repos to extract api logic
extract buttons
colors
api auth fallback
assert generic function
set file extensions for file picker
use map instead of object where its related
remove spreading?
remove array/object destructors?
use single return in functions

- moved issues:

redirect from edit page after saving (?)
download specific media: Videos have it. but it don't work due to http. bur there is no such on images
Replace left column on validation page with cvat like (on jobs) slider
stats and goals project pages missing children routes handlers

- consider following things:

React suspense as fallback before loading;
React components lazy loading;
[might be bad decision] Place children at the same level as parent to avoid props nesting;
List virtualization;