Mostly automated, with a bunch of manual fixes.

frontend: Ensure timeAgo always uses the date + 90 days when testing

We need to compare static dates when testing, otherwise snapshots
become outdated.

frontend: Catch and log Plugin initialize() errors

frontend: Fix Plugin class based plugins not loading

So that plugins that use initialize() will not crash the system
if they have an error in them.

frontend AlertNotification: Fix rule-of-hooks issues

Was causing an error in the app.

frontend ReleaseNotes: Fix query for latest release

It was breaking because it did not consider
headlamp-plugin releases.

Add msi installer

Also fixes an issue (there's no make app-windows but rather
make app-win).

Chocolatey bump to 0.11.1

Add Debian package

Center cluster chooser

This is a more adequate place for it.

This patch uses the info we have already on package.json, official one
as well as the electrno-builder's one, to build the MSI installer.

This means we get an MSI file whose name is consistent with the ones
we generate from electron-builder.

This var was getting used for setting up the TopBar when in small
(width=sm) screens. So let's use the already declared isSmall
variable.

The cluster chooser is supposed to be centered in the top bar, which
means the top bar needs to change its left margin according to whether
the sidebar is open or not.

The code that checks whether the sidebar is open (in order to
calculate the topbar size) was being tied to whether the screen is
small, but it shouldn't have to take that into account.

Show build version on frontend

Their grid item was getting added even when there were no buttons.

frontend: Fix showing cluster chooser on top bar

Docs allow to build without checking for updates

Add name for cluster chooser route

Fix typo and Update helm chart docs

In a recent change, we stopped using the cluster related hooks in the
PureTopBar component as it led to conditionally using hooks. However,
those hooks (and info from them) need to be used from the wrapping
component (TopBar), otherwise no cluster chooser button will be shown.