[style](trx-frontend-http): tighten APRS bar spacing, shrink clear btn, remove cap

- Reduce frame line-height 1.45→1.3 and pos sub-line to 1.1 to close
  the gap between the info and coordinate rows within each entry
- Shrink clear button (smaller padding, 0.78em font)
- Remove 5-entry cap; full history visible via scroll

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/aprs.js

@@ -107,7 +107,7 @@ function applyAprsFilterToAll() {
 function updateAprsBar() {
   if (!aprsBarOverlay) return;
   const isPkt = (document.getElementById("mode")?.value || "").toUpperCase() === "PKT";
-  const okFrames = aprsPacketHistory.filter((p) => p.crcOk).slice(0, 5);
+  const okFrames = aprsPacketHistory.filter((p) => p.crcOk);
   if (!isPkt || okFrames.length === 0) {
     aprsBarOverlay.style.display = "none";
     return;