Add switch filter for toggles

As there isn't a switch icon these are very close.

src/icons.yml

@@ -4864,6 +4864,8 @@ icons:
     id:         toggle-off
     unicode:    f204
     created:    4.2
+    filter:
+    - switch
     categories:
       - Web Application Icons
 
@@ -4871,6 +4873,8 @@ icons:
     id:         toggle-on
     unicode:    f205
     created:    4.2
+    filter:
+    - switch
     categories:
       - Web Application Icons