fix: Location map AppBar fixes

[g123k]

Hi everyone!

Here are two changes for the location map page:

• We force the subtitle on 1 line (seems to be a Material 3 regression)
• The positive action should always be on the right

Before:

After:

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 7.05%. Comparing base (4d9c7fc) to head (d00b780). Report is 413 commits behind head on develop.

Files with missing lines	Patch %	Lines
...oth_app/lib/pages/locations/location_map_page.dart	0.00%	7 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #5775 +/- ## ========================================== - Coverage 9.54% 7.05% -2.49% ========================================== Files 325 409 +84 Lines 16411 21969 +5558 ========================================== - Hits 1567 1551 -16 - Misses 14844 20418 +5574 ```

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