NDI discovery

ui/src/styles.css

@@ -510,6 +510,27 @@ pre {
   min-width: 8.75rem;
 }
 
+.stack-panel__config {
+  min-width: 8.5rem;
+}
+
+.modal-backdrop {
+  position: fixed;
+  z-index: 100;
+  inset: 0;
+  display: grid;
+  align-items: start;
+  justify-items: center;
+  overflow-y: auto;
+  padding: 1.5rem;
+  background: rgba(5, 8, 12, 0.72);
+}
+
+.modal-dialog {
+  width: min(100%, 1080px);
+  margin: 0 auto;
+}
+
 .config-panel {
   display: grid;
   gap: 0.9rem;
@@ -538,7 +559,7 @@ pre {
 
 .config-grid {
   display: grid;
-  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
+  grid-template-columns: repeat(2, minmax(0, 1fr));
   gap: 1rem;
 }
 
@@ -579,6 +600,20 @@ pre {
   font-size: 0.9rem;
 }
 
+.config-combo-field {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 38px;
+  gap: 0.45rem;
+  align-items: stretch;
+}
+
+.config-combo-field .icon-button {
+  width: 38px;
+  min-width: 38px;
+  height: 38px;
+  min-height: 38px;
+}
+
 .config-toggle {
   align-self: end;
   min-height: 38px;
@@ -1316,6 +1351,10 @@ pre {
     padding-top: 14px;
   }
 
+  .modal-backdrop {
+    padding: 0.5rem;
+  }
+
   .definition-grid,
   .summary-grid,
   .kv-rows,