[Project Manager] Fix Wrap Long Project Title

[CarrotOfPower]

• Closes Project Manager UI breaks when adding project to list #122075
• Closes Memory leak when resizing the Project Manager to minimum width #122257
• Fixes index reuse error noted in PR [ProjectList] Fix title index handling on refresh #122037
• Supersedes Various Fixes for Project Title Wrapping #122095
• Introduced in Editor: Wrap Long Project Title #119580

This is the first Commit ([Project Manager] Fix Wrap Long Project Title) of #122061. If #122061 gets merged, this PR is solved.

What problem(s) does this PR solve?

• This PR fixes all issues with wrapping project titles. For more info, see the two suspended PR.
• To fix ALL issues with resizing Project Manager, see [Project Manager] Fix Wrap Long Project Title and Compact Mode #122061.
• Simplifies logic significantly while maintaining the same functionality, fixing issues with long project titles not wrapping correctly.
• Replaces the magic number former used for title_size_cache through logic, so the value is calculated and save for future layout changes, while the magic number had to be adjusted for layout changes.
• Should work on any scale.

#122075

wrap_long_project_title_empty_tag_container_bug.mp4

Difference to #122095

• Fixes at least one bug contained in Various Fixes for Project Title Wrapping #122095 (when I write this).
• Various Fixes for Project Title Wrapping #122095 does NOT fix Memory leak when resizing the Project Manager to minimum width #122257.
• This PR replaces the magic number former used for title_size_cache through logic, so the value is calculated and save for future layout changes, while the magic number had to be adjusted for layout changes.
• Some Optimizations, which also makes the code cleaner to read.
• The behaviour itself. Here a demo:

Note

This PR may seem broken.
This is because of the new compact mode in 4.8 Master.
#122061 has the fix for that behaviour and is built on top of this commit.

This is #122152:

various-fixes-for-project-title-wrapping.mp4

As you may notice, the tags do not resize at first, title and tags share the space somewhere in the middle.
Also, you see the errors from #122257 in the terminal window.

This PR:

122204-demo.mp4

It ensures that the tags do resize at first, so the title can take mor space, which can be used more efficiently.
You don't see any errors in the terminal window.

Also, this PR is related to #122061, and it would be very easy to merge that PR into 4.8 Master, if this PR gets merged.

Additional information

Validated by building the Windows editor with SCons and testing it, as well as testing the test artifact for Windows.

[CarrotOfPower]

If this PR gets merged in master, I strongly recommand merging #122061 subsequently.

[CarrotOfPower]

#122350 should be merged for 4.7.2.
See here.