Styling update to fonts

The log rows were mutated in the store, what resulted in wrong deduplication results as well as made the selector memoization quirky - for "the same results" the selector was running twice. 

Fix: #14706 Incorrect index pattern padding in alerting queries

Revert "Fix Datasource Update to no User/Password"

Fixed alias in Cloudwatch Expressions

fix imageurl in notification test

skip unnecessary http -> https redirect, which could make problems on some notifiers

move stringToJsRegex to grafana/ui

Minor storybook cleanup

- DeleteButton should use withCenteredStory like everythign else
- Clicking the 'Red' button should not pick blue :)

docs: update slack alert notification settings

docs: Fix indentation level for OAuth2 config

docs: update CONTRIBUTING.md

closes #15878

Optimize dingding alert message

* Readme update

* Update @grafana/ui Readme qith release process description. Allow version commit creation during release

* Run tests and checks for grafana/core before releasing grafana/ui

* Post review Readme updates

Preserve tags switch option in Save As modal

fix allow anonymous server bind for ldap search

add nil/length check when delete old login attempts

Merge branch '11780_wrong_repexp_in_series' of https://github.com/SamuelToh/grafana into SamuelToh-11780_wrong_repexp_in_series

changed root font to 100%(default 16px), changed font-size from px to rem, updated rem sizes in template and default.ts files, removed display classes and variables since not used, removed lead class and variables since not usedremoved serif font since not used and probably never should be used