BUG: Fix click to center on multiple visible layers when linked by WCS

[pllim]

Description

Fixes #2749

Change log entry

• Is a change log needed? If yes, is it added to CHANGES.rst? If you want to avoid merge conflicts,
  list the proposed change log here for review and add to CHANGES.rst before merge. If no, maintainer
  should add a no-changelog-entry-needed label.

Checklist for package maintainer(s)

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• Are two approvals required? Branch protection rule does not check for the second approval. If a second approval is not necessary, please apply the trivial label.
• Do the proposed changes actually accomplish desired goals? Also manually run the affected example notebooks, if necessary.
• Do the proposed changes follow the STScI Style Guides?
• Are tests added/updated as required? If so, do they follow the STScI Style Guides?
• Are docs added/updated as required? If so, do they follow the STScI Style Guides?
• Did the CI pass? If not, are the failures related?
• Is a milestone set? Set this to bugfix milestone if this is a bug fix and needs to be released ASAP; otherwise, set this to the next major release milestone. Bugfix milestone also needs an accompanying backport label.
• After merge, any internal documentations need updating (e.g., JIRA, Innerspace)? 🐱

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 88.68%. Comparing base (adda177) to head (9515b7a).
Report is 1 commits behind head on main.

Files	Patch %	Lines
jdaviz/configs/imviz/plugins/tools.py	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2750      +/-   ##
==========================================
+ Coverage   88.63%   88.68%   +0.05%     
==========================================
  Files         108      108              
  Lines       16210    16214       +4     
==========================================
+ Hits        14367    14379      +12     
+ Misses       1843     1835       -8     

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[rosteen]

Looks like this fixed the issue, I'll give a real review/approval once it's ready.

[pllim]

Without this patch, it would fail with this error here:

E           AssertionError:
E           Not equal to tolerance rtol=1e-07, atol=0
E
E           Mismatched elements: 1 / 1 (100%)
E           Max absolute difference: 0.00015008
E           Max relative difference: 7.58381226e-07
E            x: array(197.892778)
E            y: array(197.892628)

[kecnry]

This makes sense to me - thanks for the quick fix!

[rosteen]

LGTM!