Adjust inspector panel

[rustamwin]

Q	A
Is bugfix?	✔️/❌
New feature?	✔️/❌
Breaks BC?	✔️/❌
Fixed issues	comma-separated list of tickets # fixed by the PR, if any

[what-the-diff[bot]]

• Change the logo link to /debug
• Add a new panel for inspector
• Fix tests in codeception panel (add POST method)

[codecov[bot]]

Codecov Report

Base: 0.00% // Head: 0.00% // No change to project coverage :thumbsup:

Coverage data is based on head (d850268) compared to base (b0decf3). Patch coverage: 0.00% of modified lines in pull request are covered.

:exclamation: Current head d850268 differs from pull request most recent head f29b346. Consider uploading reports for the commit f29b346 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #51 +/- ## ======================================== Coverage 0.00% 0.00% Complexity 58 58 ======================================== Files 18 18 Lines 137 137 ======================================== Misses 137 137 ``` | [Impacted Files](https://codecov.io/gh/yiisoft/yii-debug-viewer/pull/51?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft) | Coverage Δ | | |---|---|---| | [src/Panels/InspectorPanel.php](https://codecov.io/gh/yiisoft/yii-debug-viewer/pull/51/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL1BhbmVscy9JbnNwZWN0b3JQYW5lbC5waHA=) | `0.00% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft)

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