fix(StatusChatInput): Request link previews only when the StatusChatInput text is actually changing

The `onTextChanged` event is triggered by the StatusSynthaxHighlighter whenever the text style changes even if the text string doesn't.
This event needs to be filtered before notifying the backend about the text change.

ui/app/AppLayouts/Chat/views/ChatColumnView.qml

@@ -292,7 +292,7 @@ Item {
                     chatType: root.activeChatType
 
                     textInput.onTextChanged: {
-                        if (!!d.activeChatContentModule) {
+                        if (!!d.activeChatContentModule && textInput.text !== d.activeChatContentModule.inputAreaModule.preservedProperties.text) {
                             d.activeChatContentModule.inputAreaModule.preservedProperties.text = textInput.text
                             d.updateLinkPreviews()
                         }