watchos: display a message if the recent list is empty

ios/app/watchos/app/Base.lproj/Interface.storyboard

@@ -14,6 +14,7 @@
             <objects>
                 <controller title="Meetings" id="AgC-eL-Hgc" customClass="InterfaceController" customModule="JitsiMeetCompanion" customModuleProvider="target">
                     <items>
+                        <label alignment="left" textAlignment="left" numberOfLines="0" id="OQN-sx-tDt"/>
                         <table alignment="left" id="gpO-ql-Xsr">
                             <items>
                                 <tableRow identifier="MeetingRowType" id="GGl-av-xeJ" customClass="MeetingRowController" customModule="JitsiMeetCompanion_Extension">
@@ -39,6 +40,7 @@
                         </table>
                     </items>
                     <connections>
+                        <outlet property="infoLabel" destination="OQN-sx-tDt" id="Juv-tb-SNj"/>
                         <outlet property="table" destination="gpO-ql-Xsr" id="aVV-iZ-z3l"/>
                     </connections>
                 </controller>

ios/app/watchos/extension/InterfaceController.swift

@@ -16,17 +16,31 @@
  */
 
 import WatchKit
+import WatchConnectivity
 import Foundation
 
 
 class InterfaceController: WKInterfaceController {
 
+    @IBOutlet var infoLabel: WKInterfaceLabel!
     @IBOutlet var table: WKInterfaceTable!
 
+    override func didAppear(){
+        self.updateUI(ExtensionDelegate.currentJitsiMeetContext)
+    }
+
     func updateUI(_ newContext:JitsiMeetContext) {
-        if let recentURLsArray = newContext.recentURLs {
-            updateRecents(withRecents:  recentURLsArray, currentContext: newContext)
-        }
+      if (newContext.recentURLs == nil || newContext.recentURLs!.count == 0) {
+        infoLabel.setText("There are no recent meetings. Please use the app on the phone to start a new call.")
+
+        table.setHidden(true)
+        infoLabel.setHidden(false)
+      } else {
+        updateRecents(withRecents: newContext.recentURLs!, currentContext: newContext)
+
+        table.setHidden(false)
+        infoLabel.setHidden(true)
+      }
     }
 
     private func updateRecents(withRecents recents: NSArray, currentContext: JitsiMeetContext) {
@@ -68,7 +82,7 @@ class InterfaceController: WKInterfaceController {
     override func contextForSegue(withIdentifier segueIdentifier: String, in table: WKInterfaceTable, rowIndex: Int) -> Any? {
         let controller = table.rowController(at: rowIndex) as! MeetingRowController
         let currentContext = ExtensionDelegate.currentJitsiMeetContext
-      
+
         // Copy the current context and add the joinConferenceURL to trigger the command when the in-call screen is displayed
         let actionContext = JitsiMeetContext(jmContext: currentContext)
         actionContext.joinConferenceURL = controller.roomUrl