refactor: drop bootstrap

[davidyuk]

closes #740

@Liubov-crypto would be nice to ensure that it doesn't add any significant visual bugs in both mobile and desktop

[github-actions]

Deployed to feature-drop-bootstrap.aggregator.z52da5wt.xyz, bundle report

[Liubov-crypto]

Tested in mobile and desktop browsers, in general LGTM:
Trending - pass
Search - pass
Change profile/back pics - pass
Change profile info - pass
Cookies - pass
Send Tip on the Feed - pass
Retip on the feed - pass
Post without tipping - pass
Comment - pass
Tip comment on the feed - pass
Pin/Unpin - pass
Claim - pass
Report post - pass
Voting - pass
Vote - pass
Revoke Vote - pass
Delegate voting power - pass
Create a new poll - pass
Search - pass
Meet - pass
Updates - pass
Faq- pass

also remains #1112
Not synced names in Meet UI and SH wallet.

I haven't been using the wallet for a while, got this error. But maybe this is the wallet side (#1180 in wallet issues):

It is possible to move the wallet to the left in the mobile browser:

[Liubov-crypto]

Voting does not sync with the wallet and it is impossible to make a transaction (mobile browser):

[davidyuk]

It is possible to move the wallet to the left in the mobile browser

This issue persists in develop branch, so fixing it separately in #1127

All other issues seems to be resolved