PREOPS-4934: Fix minor issues found during end-to-end testing.

[alserene]

Changes addressing identified issues include:

• Map heading now consistent across basis function selection by row selection or drop-down.
• Upper bound of date range decreased by 0.01 MJD (~15 mins) to prevent error at upper bound.
• Reset nside and colour palette to defaults when reset button clicked.

Additional aesthetic and code layout changes include:

• Reset button moved up slightly to fill gap.
• Hover description added to reset button and icon slightly increased in size.
• Function called on button click moved out of layout code section.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 13.11%. Comparing base (393e6ec) to head (0196863).

Files	Patch %	Lines
...iew/app/scheduler_dashboard/scheduler_dashboard.py	0.00%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #72      +/-   ##
==========================================
- Coverage   13.13%   13.11%   -0.02%     
==========================================
  Files          43       43              
  Lines        3381     3385       +4     
  Branches      501      501              
==========================================
  Hits          444      444              
- Misses       2928     2932       +4     
  Partials        9        9              

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[ehneilsen]

Looks good.