Bug fix and minor improvements

Improvements:
- Add instant feedback upon setting a different
  presence for account (local echo)
- Sort room members by power level and then
  presence
- Periodically update members' `last_acitve_at`
  field on the room pane
- Move status message field up on account context
  menu, and put invisible before offline again

Bug fix:
- Do not try to override presence set from
  another client, accept it

src/gui/MainPane/AccountContextMenu.qml

@@ -21,38 +21,6 @@ HMenu {
     }
 
 
-    HMenuItem {
-        icon.name: "presence"
-        icon.color: theme.controls.presence.online
-        text: qsTr("Online")
-        onTriggered: setPresence("online")
-    }
-
-    HMenuItem {
-        enabled: presence
-        icon.name: "presence-busy"
-        icon.color: theme.controls.presence.unavailable
-        text: qsTr("Unavailable")
-        onTriggered: setPresence("unavailable")
-    }
-
-    HMenuItem {
-        icon.name: "presence-offline"
-        icon.color: theme.controls.presence.offline
-        text: qsTr("Offline")
-        onTriggered: setPresence("offline")
-    }
-
-    HMenuItem {
-        enabled: presence
-        icon.name: "presence-invisible"
-        icon.color: theme.controls.presence.offline
-        text: qsTr("Invisible")
-        onTriggered: setPresence("invisible")
-    }
-
-    HMenuSeparator { }
-
     HLabeledItem {
         id: statusMsgLabel
         enabled: presence && presence !== "offline"
@@ -95,6 +63,38 @@ HMenu {
         }
     }
 
+    HMenuSeparator { }
+
+    HMenuItem {
+        icon.name: "presence"
+        icon.color: theme.controls.presence.online
+        text: qsTr("Online")
+        onTriggered: setPresence("online")
+    }
+
+    HMenuItem {
+        enabled: presence
+        icon.name: "presence-busy"
+        icon.color: theme.controls.presence.unavailable
+        text: qsTr("Unavailable")
+        onTriggered: setPresence("unavailable")
+    }
+
+    HMenuItem {
+        enabled: presence
+        icon.name: "presence-invisible"
+        icon.color: theme.controls.presence.offline
+        text: qsTr("Invisible")
+        onTriggered: setPresence("invisible")
+    }
+
+    HMenuItem {
+        icon.name: "presence-offline"
+        icon.color: theme.controls.presence.offline
+        text: qsTr("Offline")
+        onTriggered: setPresence("offline")
+    }
+
     HMenuSeparator {
         visible: statusMsgLabel.visible
         height: visible ? implicitHeight : 0