Tweak FEA reference handling, add understanding of BIWOTA, remove some unused junk from ui-ham.js

core/constants.py

@@ -154,7 +154,9 @@ SIGS = [
         name="FEA",
         comment_names=["FEA"],
         description="Diploma Faros de España",
-        ref_regex=r"([DE]|FEA)\-\d{4}(\.\d)?",
+        # FEA references are technically [DE]\-\d{4}(\.\d)? but spotters always seem to miss out the D- or E-
+        # prefix and just use FEA 1234, so we treat FEA reference IDs as if they were just the number.
+        ref_regex=r"\d{4}(\.\d)?",
     ),
     SIG(
         name="DTMBA",
@@ -162,6 +164,11 @@ SIGS = [
         description="Diploma Teatri Musei e Belle Arti",
         ref_regex=r"I-?[0-9]{3,4}\s?[A-Z]{2}",
     ),
+    SIG(
+        name="BIOWTA",
+        comment_names=["BIWOTA"],
+        description="British Inland Waterways on the Air"
+    ),
     SIG(
         name="Toilets",
         comment_names=[],