Tab to move quicker between sections

shell/plugins/panels/Audio.qml

@@ -169,6 +169,17 @@ Panel {
     }
   }
 
+  function moveSection(delta) {
+    var sections = visibleSections
+    if (sections.length === 0) return
+    var current = sections.indexOf(focusSection)
+    if (current < 0) current = delta > 0 ? -1 : 0
+    var next = (current + delta + sections.length) % sections.length
+    focusSection = sections[next]
+    selectedIndex = sectionHasSlider(focusSection) ? -1 : 0
+    cursorActive = true
+  }
+
   // Adjust the slider associated with the focused section. Output and
   // input sliders are real volume controls; on stream rows h/l adjusts
   // that stream's volume (so keyboard parity with the inline slider).
@@ -575,6 +586,7 @@ Panel {
       }
       onActivateRequested: if (root.cursorActive) root.activateCursor()
       onCloseRequested: root.close()
+      onTabRequested: function(direction) { root.moveSection(direction) }
       onTextKey: function(t) {
         // 'm' mutes whatever the cursor is on: focused section's slider
         // for output/input, the focused stream for streams.