feat(matrix): the DIG row cycles through your own digital modes

One row per digital mode would be the honest layout, and there is no
height for it: the matrix sits in a fixed panel beside a dozen widgets.
So the row keeps its place and changes what it answers — DIG, then each
digital mode the operator's own list holds, in the order they put them
in, then back to DIG.

It costs no round trip. The query behind the matrix already grouped by
band AND mode; only the collapse to a class threw that away, so the same
cell is now published under the raw mode name too. Digital only: PH and
CW have nothing to cycle through.

On a specific mode the you-are-here mark follows THAT mode, or every FT4
entry would light whichever digital row the rotation happened to rest
on. A four-letter mode drops to 9px rather than widen a column sized for
three characters and push the whole matrix sideways. Opens 0.27.8.

changelog.json

@@ -1,4 +1,14 @@
 [
+  {
+    "version": "0.27.8",
+    "date": "",
+    "en": [
+      "The band matrix’s DIG row is now a rotation: click it and it answers for FT8, then FT4, then each digital mode your mode list holds — in YOUR order — then back to DIG. One row per digital mode would be the honest layout and there is no height for it beside the other widgets, so the row keeps its place and changes what it says."
+    ],
+    "fr": [
+      "La ligne DIG de la matrice devient une rotation : un clic et elle répond pour FT8, puis FT4, puis chaque mode numérique de votre liste — dans VOTRE ordre — puis retour à DIG. Une ligne par mode numérique serait la mise en page honnête et la hauteur manque à côté des autres widgets : la ligne garde donc sa place et change ce qu’elle dit."
+    ]
+  },
   {
     "version": "0.27.7",
     "date": "",