Move user panel to new component

[maciaszczykm]

What this PR does / why we need it: It is a copy of #2388. I will add next PRs from the new fork.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #1979

Special notes for your reviewer:

Release note:

Updated user panel styling.

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: maciaszczykm

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[kgroschoff]

/lgtm

[kubermatic-bot]

LGTM label has been added.

Git tree hash: 54355dba562c321b811dff241bff0051627e75ab

[kubermatic-triage-bot]

/retest
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Review the full test history

Silence the bot with an /lgtm cancel or /hold comment for consistent failures.

Also, here is a cat.
/meow

[kubermatic-bot]

@kubermatic-triage-bot:

In response to this:

/retest
This bot automatically retries jobs that failed/flaked on approved PRs

Review the full test history

Silence the bot with an /lgtm cancel or /hold comment for consistent failures.

Also, here is a cat.
/meow

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[kubermatic-bot]

New changes are detected. LGTM label has been removed.

[maciaszczykm]

/retest

[kubermatic-bot]

New changes are detected. LGTM label has been removed.

[kubermatic-bot]

New changes are detected. LGTM label has been removed.

[maciaszczykm]

/cherry-pick release/v2.14

[kubermatic-bot]

@maciaszczykm: #2399 failed to apply on top of branch "release/v2.14":

error: Failed to merge in the changes.
Using index info to reconstruct a base tree...
M	src/app/core/components/navigation/navigation.component.spec.ts
M	src/app/core/components/navigation/navigation.component.ts
M	src/app/core/core.module.ts
Falling back to patching base and 3-way merge...
Auto-merging src/app/core/core.module.ts
CONFLICT (content): Merge conflict in src/app/core/core.module.ts
Auto-merging src/app/core/components/user-panel/user-panel.component.spec.ts
CONFLICT (content): Merge conflict in src/app/core/components/user-panel/user-panel.component.spec.ts
Auto-merging src/app/core/components/navigation/navigation.component.ts
CONFLICT (content): Merge conflict in src/app/core/components/navigation/navigation.component.ts
Patch failed at 0001 Create user panel component

In response to this:

/cherry-pick release/v2.14

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