fix: AppMainMenu: use compact layout if screen is narrow

[KaevN]

Description

in a small screen width, the buttons to select an element, refresh and settings, do not fit due to the fact that the inspector and timeline buttons have a label

before:

after:

Additional context

I think that it can be done better, but I just corrected what bothered me

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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