Re-add pending event indicator

This seems to have been accidentally removed

BUG: 491277

src/timeline/Bubble.qml

@@ -74,6 +74,8 @@ QQC2.Control {
      */
     property real maxContentWidth: -1
 
+    required property bool isPending
+
     /**
      * @brief The reply has been clicked.
      */
@@ -89,7 +91,14 @@ QQC2.Control {
      */
     signal showMessageMenu
 
-    contentItem: ColumnLayout {
+    contentItem: RowLayout {
+        Kirigami.Icon {
+            source: "content-loading-symbolic"
+            Layout.preferredWidth: Kirigami.Units.iconSizes.small
+            Layout.preferredHeight: Kirigami.Units.iconSizes.small
+            visible: root.isPending && NeoChatConfig.showLocalMessagesOnRight
+        }
+        ColumnLayout {
             id: contentColumn
             spacing: Kirigami.Units.smallSpacing
             Repeater {
@@ -113,6 +122,13 @@ QQC2.Control {
                 }
             }
         }
+        Kirigami.Icon {
+            source: "content-loading-symbolic"
+            Layout.preferredWidth: Kirigami.Units.iconSizes.small
+            Layout.preferredHeight: Kirigami.Units.iconSizes.small
+            visible: root.isPending && !NeoChatConfig.showLocalMessagesOnRight
+        }
+    }
 
     background: Kirigami.ShadowedRectangle {
         id: bubbleBackground

src/timeline/MessageDelegate.qml

@@ -288,6 +288,8 @@ TimelineDelegate {
 
                 showHighlight: root.showHighlight
 
+                isPending: root.isPending
+
                 onReplyClicked: eventId => {
                     root.replyClicked(eventId);
                 }