Use Tab to switch bar panels

shell/plugins/panels/audio/Panel.qml

@@ -559,7 +559,7 @@ Panel {
       }
       onActivateRequested: if (root.cursorActive) root.activateCursor()
       onCloseRequested: root.close()
-      onTabRequested: function(direction) { root.moveSection(direction) }
+      onTabRequested: function(direction) { root.switchPanel(direction) }
       onTextKey: function(t) {
         // 'm' mutes whatever the cursor is on: focused section's slider
         // for output/input, the focused stream for streams.

shell/plugins/panels/bluetooth/Panel.qml

@@ -434,6 +434,7 @@ Panel {
       }
       onActivateRequested: if (root.cursorActive) root.activateCursor()
       onCloseRequested: root.close()
+      onTabRequested: function(direction) { root.switchPanel(direction) }
       onDeleteRequested: if (root.cursorActive) root.deleteSelected()
 
       Column {

shell/plugins/panels/monitor/Panel.qml

@@ -372,6 +372,7 @@ Panel {
       }
       onActivateRequested: if (root.cursorActive) root.activateCursor()
       onCloseRequested: root.close()
+      onTabRequested: function(direction) { root.switchPanel(direction) }
 
       ScrollView {
         id: scrollArea

shell/plugins/panels/network/Panel.qml

@@ -664,6 +664,7 @@ Panel {
         }
       }
       onCloseRequested: root.close()
+      onTabRequested: function(direction) { root.switchPanel(direction) }
       onTextKey: function(t) {
         if (t === "r" || t === "R") root.refresh()
       }

shell/plugins/panels/power/Panel.qml

@@ -279,6 +279,7 @@ Panel {
       }
       onActivateRequested: if (root.cursorActive) root.activateSelectedProfile()
       onCloseRequested: root.close()
+      onTabRequested: function(direction) { root.switchPanel(direction) }
 
       Column {
         id: column

shell/plugins/panels/tailscale/Panel.qml

@@ -296,6 +296,7 @@ Panel {
       }
       onActivateRequested: if (root.cursorActive) root.activateCursor()
       onCloseRequested: root.close()
+      onTabRequested: function(direction) { root.switchPanel(direction) }
       onTextKey: function(t) {
         if (t === "t" || t === "T") tailscale.toggleTailscale()
         else if (t === "c" || t === "C") tailscale.copyPeerIp(root.selectedPeer())