Hide main menu project title when in icon only mode (collapsed) as it breaks layout
What does this MR do?
Noticed the title is causing the collapsed menu to break if it wraps over multiple lines as it is only not visible by overflow and not hidden.
Why was this MR needed?
It fixes the main menu which is currently looking a bit off.
Screenshots (if relevant)
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After: 
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary -
Documentation created/updated -
API support added -
Tests added for this feature/bug - Review
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Has been reviewed by UX -
Has been reviewed by Frontend -
Has been reviewed by Backend -
Has been reviewed by Database
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Conform by the merge request performance guides -
Conform by the style guides -
Squashed related commits together