Migrating to baron scrollbar WIP

Merge remote-tracking branch 'upstream/11053-remove-native-scrollbar' into 11053-remove-native-scrollbar

build: remove code cov

Adds 1px of padding to the graph legend scroll div so that a non-table
legend does not get an unnecessary scroll bar.

The -webkit-overflow-scrolling is an iOS only property:

https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-overflow-scrolling

that turns on momementum/continuation scrolling for iOS devices. This means
that when swiping, the scroll continues for a half second rather than instantly
stopping the scroll when the user lifts their finger from the screen.

Add minimal IAM policy example for CloudWatch data source

Fixes #11562

Hide page scrollbar when rendering using phantomjs.
Hide baron scrollbar when rendering using phantomjs.

Fixes the height of the settings menu

Merge remote-tracking branch 'upstream/11053-remove-native-scrollbar' into 11053-remove-native-scrollbar

This should make the scrolling user experience much better since it
will highlight and show that content actually can be scrolled when
hovering over a panel.

The page scrollbars are custom, not rendered on the body element and
with css property overflow set for scroll to be enabled.
For being able to scroll the page using the keyboard when a
page loads, some custom code was needed.
This fix should both work when doing a full reload of a url and when
navigating to other pages/dashboards.
For those pages having an input field that are focused on load,
scrolling by keyboard (arrow up/down) will obviously not work.

This resolves issue with dash list panel getting scrollbars
    attached to incorrect elements. Now the panel content are
    rendered correctly and all content are displayed as
    expected.

This resolves issue with alert list panel getting scrollbars
attached to incorrect element. Now the panel content are
rendered correctly and all content are displayed as
expected.

closes #11003

migrated metric_segment to ts

Merge branch 'fix-11053' of https://github.com/alexanderzobnin/grafana into alexanderzobnin-fix-11053

Update annotations.md to contain correct annotations api path

Rename direct/proxy access mode to browser/server

Changes access drop down options names:
- proxy -> Server (Default)
- direct -> Browser
Replace access drop down info icon/tooltip with expandable/collapsable
help section.

Temporary fix so that the add panel panel works properly. This will
break a3f15ced.