Remove distinction between DV modes and LSB/USB

core/constants.py

@@ -182,16 +182,9 @@ CW_MODES = ["CW"]
 PHONE_MODES = [
     "PHONE",
     "SSB",
-    "USB",
-    "LSB",
     "AM",
     "FM",
-    "DV",
-    "DMR",
-    "DSTAR",
-    "C4FM",
-    "FUSION",
-    "M17",
+    "DV"
 ]
 DATA_MODES = [
     "DATA",
@@ -209,14 +202,19 @@ DATA_MODES = [
 ]
 ALL_MODES = CW_MODES + PHONE_MODES + DATA_MODES
 MODE_TYPES = ["CW", "PHONE", "DATA"]
-SSB_SUB_MODES = ["USB", "LSB"]
-DV_SUB_MODES = ["DMR", "DSTAR", "C4FM", "FUSION", "M17"]
 
 # Mode aliases. Sometimes we get spots with a mode described in a different way that is effectively the same as a mode
 # we already know, or we want to normalise things for consistency. The lookup table for this is here. Incoming spots
 # that match a key in this table will be converted to the corresponding value, so only the modes above will actually be
 # present in the spots.
 MODE_ALIASES = {
+    "USB": "SSB",
+    "LSB": "SSB",
+    "DMR": "DV",
+    "DSTAR": "DV",
+    "C4FM": "DV",
+    "FUSION": "DV",
+    "M17": "DV",
     "RTT": "RTTY",
     "BPSK": "PSK",
     "PSK31": "PSK",

core/utils.py

@@ -70,7 +70,7 @@ def infer_mode_from_frequency(freq):
         mode = freq_to_band(khz)["mode"]
         # Some additional common digimode ranges in addition to what the 3rd-party freq_to_band function returns.
         # This is mostly here just because freq_to_band is very specific about things like FT8 frequencies, and e.g.
-        # a spot at 7074.5 kHz will be indicated as LSB, even though it's clearly in the FT8 range. Future updates
+        # a spot at 7074.5 kHz will be indicated as SSB, even though it's clearly in the FT8 range. Future updates
         # might include other common digimode centres of activity here, but this achieves the main goal of keeping
         # large numbers of clearly-FT* spots off the list of people filtering out digimodes.
         if (