MRG: Two small fixes for Inspector

[hoechenberger]

These two issues bugged @dnacombo

Merge checklist

Maintainer, please confirm the following before merging:

• All comments resolved
• This is not your own PR
• All CIs are happy
• PR title starts with [MRG]
• whats_new.rst is updated
• PR description includes phrase "closes <#issue-number>"

[hoechenberger]

@sappelhoff merge if you're happy :)

[agramfort]

thx @hoechenberger

[codecov-io]

Codecov Report

Merging #769 (c3cdc93) into main (29f867b) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #769   +/-   ##
=======================================
  Coverage   94.01%   94.01%           
=======================================
  Files          23       23           
  Lines        2807     2807           
=======================================
  Hits         2639     2639           
  Misses        168      168           

Impacted Files	Coverage Δ
mne_bids/inspect.py	98.74% <100.00%> (ø)

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