Fixes#15127:Positioningfixedformenubar,top_paddingforbody

Description

The white guest block which was appearing after reloading on designer's page

Please describe your pull request.
Added padding to body and positioning to #floating-navbar

Fixes #15127

Before submitting pull request, please review the following checklist:

• [x] Make sure you have read our CONTRIBUTING.md document.


• [x] Make sure you are making a pull request against the correct branch. For example, for bug fixes in a released version use the corresponding QA branch and for new features use the master branch. If you have a doubt, you can ask as a comment in the bug report or on the mailing list.


• [x] Every commit has proper
  

  1	Signed-off-by

  line as described in our DCO. This ensures that the work you're submitting is your own creation.



• [x] Every commit has a descriptive commit message.


• [x] Every commit is needed on its own, if you have just minor fixes to previous commits, you can squash them.


• [ ] Any new functionality is covered by tests.

该提问来源于开源项目：phpmyadmin/phpmyadmin