Update CSS of Altimetry

[Huquette]

This pull request changes how altitude profiles look. Right now, they look like this:

After this change, they will look like this:

As a result, the altitude profile will show higher up on the page, which let some space for the attribution mark.

[codecov]

Codecov Report

Merging #210 (0daeb1d) into master (f3d4121) will not change coverage.
Report is 2 commits behind head on master.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #210   +/-   ##
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  Coverage   98.78%   98.78%           
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  Files         157      157           
  Lines        5429     5429           
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  Hits         5363     5363           
  Misses         66       66           

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[babastienne]

@Huquette the PR seems good to me. I'd like to test the feature before approving the merge. I suggest we discuss it this afternoon to test it, especially in mobile / tablet views and if it's concluant you'll merge.