Class-A surfacing 2/3: surface match, boundary patch and CV fairing (#1487)

Thanks @midasdf.

assets/locales/de.json

@@ -366,8 +366,10 @@
   "cmd.surface_blend": "Verbindungsfläche",
   "cmd.surface_boundary": "Begrenzungsfläche",
   "cmd.surface_extrude": "Flächen-Extrusion",
+  "cmd.surface_fair": "Flächenbegradigung",
   "cmd.surface_fillet": "Flächenverrundung",
   "cmd.surface_loft": "Flächen-Loft",
+  "cmd.surface_match": "Flächenanpassung",
   "cmd.surface_offset": "Offsetfläche",
   "cmd.surface_patch": "Patch",
   "cmd.surface_reverse_normal": "Normale umkehren",