Add magex to the dropdown and cleanup (#258)

* Add magex to the dropdown

* Make the dropdown match the affiliated list on the website

src/sunpy_sphinx_theme/__init__.py

@@ -39,17 +39,19 @@ def default_navbar():
             [
                 ("sunpy", "https://docs.sunpy.org/", 3),
                 ("ndcube", "https://docs.sunpy.org/projects/ndcube/", 3),
-                ("aiapy", "https://aiapy.readthedocs.io/", 3),
                 ("drms", "https://docs.sunpy.org/projects/drms/", 3),
-                ("pfsspy", "https://pfsspy.readthedocs.io/", 3),
-                ("radiospectra", "https://docs.sunpy.org/projects/radiospectra/", 3),
-                ("sunkit-instruments ", "https://docs.sunpy.org/projects/sunkit-instruments/", 3),
-                ("sunkit-image", "https://docs.sunpy.org/projects/sunkit-image/", 3),
                 ("sunraster", "https://docs.sunpy.org/projects/sunraster/", 3),
+                ("sunkit-image", "https://docs.sunpy.org/projects/sunkit-image/", 3),
+                ("aiapy", "https://aiapy.readthedocs.io/", 3),
                 ("sunpy-soar", "https://docs.sunpy.org/projects/soar/", 3),
                 ("roentgen", "https://roentgen.readthedocs.io/", 3),
+                ("sunkit-instruments ", "https://docs.sunpy.org/projects/sunkit-instruments/", 3),
                 ("demcmc", "https://demcmc.readthedocs.io/en/latest/", 3),
                 ("dkist", "https://docs.dkist.nso.edu/projects/python-tools", 3),
+                ("solarmach", "https://solarmach.readthedocs.io/en/stable/", 3),
+                ("sunkit-magex", "https://docs.sunpy.org/projects/sunkit-magex/", 3),
+                ("pyflct", "https://pyflct.readthedocs.io/", 3),
+                ("radiospectra", "https://docs.sunpy.org/projects/radiospectra/", 3),
             ],
         ),
         ("Affiliated Packages", "affiliated/", 2),