fix reference to plugins in metadata (#2826)

* fix reference to plugins in metadata

* changed to be the human-friendly name in #2680, but missed updating a few cases, resulting in moment maps not being linked correctly

* TST: Add link cids check
as regression test. This check currently fails on main but should be passing
as part of PR 2826

---------

Co-authored-by: P. L. Lim <2090236+pllim@users.noreply.github.com>

jdaviz/app.py

@@ -709,8 +709,8 @@ def _link_new_data(self, reference_data=None, data_to_be_linked=None):
             dc.add_link(links)
             return
 
-        elif (linked_data.meta.get('Plugin', None) == 'SpectralExtraction' or
-                (linked_data.meta.get('Plugin', None) == ('GaussianSmooth') and
+        elif (linked_data.meta.get('Plugin', None) == 'Spectral Extraction' or
+                (linked_data.meta.get('Plugin', None) == ('Gaussian Smooth') and
                  linked_data.ndim < 3 and  # Cube linking requires special logic. See below
                  ref_data.ndim < 3)
               ):
@@ -749,7 +749,7 @@ def _link_new_data(self, reference_data=None, data_to_be_linked=None):
             ref_index = ind
             if (len_linked_pixel == 2 and
                     (linked_data.meta.get("Plugin", None) in
-                     ['MomentMap', 'Collapse'])):
+                     ['Moment Maps', 'Collapse'])):
                 if pixel_coord == 'z':
                     linked_index = pc_linked.index('x')
                 elif pixel_coord == 'y':

jdaviz/configs/cubeviz/plugins/moment_maps/tests/test_moment_maps.py

@@ -128,6 +128,10 @@ def test_moment_calculation(cubeviz_helper, spectrum1d_cube, tmp_path):
     assert len(dc.links) == 22
     assert len(dc.external_links) == 4  # pixel linked
     # Link 3D z to 2D x and 3D y to 2D y
+    assert (dc.external_links[0].cids1[0].label == "Pixel Axis 0 [z]" and
+            dc.external_links[0].cids2[0].label == "Pixel Axis 1 [x]" and
+            dc.external_links[1].cids1[0].label == "Pixel Axis 1 [y]" and
+            dc.external_links[1].cids2[0].label == "Pixel Axis 0 [y]")
 
     # Coordinate display should be unaffected.
     label_mouseover._viewer_mouse_event(flux_viewer, {'event': 'mousemove',