feat(PinnedMessagesPopup): enable Unpin context menu entry

and remove the context actions we do not actually use

Fixes: #7439

ui/app/AppLayouts/Chat/popups/PinnedMessagesPopup.qml

@@ -136,24 +136,12 @@ StatusDialog {
                 root.close()
             }
 
-            onPinMessage: {
-                root.messageStore.pinMessage(messageId)
-            }
-
             onUnpinMessage: {
-                root.messageStore.unpinMessage(messageId)
-            }
-
-            onToggleReaction: {
-                root.messageStore.toggleReaction(messageId, emojiId)
-            }
-
-            onOpenProfileClicked: {
-                Global.openProfilePopup(publicKey, null, state)
+                root.messagesModule.unpinMessage(messageId)
             }
 
             onJumpToMessage: {
-                root.messagesModule.jumpToMessage(messageId);
+                root.messagesModule.jumpToMessage(messageId)
             }
         }
     }

ui/imports/shared/views/chat/MessageContextMenuView.qml

@@ -410,6 +410,9 @@ StatusPopupMenu {
         }
         icon.name: "pin"
         enabled: {
+            if (root.pinnedPopup)
+                return true
+
             if(root.isProfile || root.isEmoji || root.isRightClickOnImage)
                 return false