Consider preview thumbnails to calculate msg width

Also move thumbnails width setting from settings.json to the theme

src/qml/Chat/Timeline/EventContent.qml

@@ -54,9 +54,14 @@ Row {
         width: Math.min(
             eventList.width - avatar.width - eventContent.spacing,
             theme.fontSize.normal * 0.5 * 75,  // 600 with 16px font
+
             Math.max(
                 nameLabel.visible ? (nameLabel.implicitWidth + 1) : 0,
+
                 contentLabel.implicitWidth + 1,
+
+                previewLinksRepeater.count > 0 ?
+                theme.chat.message.thumbnailWidth : 0,
             )
         )
         height: childrenRect.height

src/qml/Chat/Timeline/EventImage.qml

@@ -4,16 +4,14 @@ import "../../Base"
 HImage {
     id: image
     x: eventContent.spacing
-    sourceSize.width: maxDimension
-    sourceSize.height: maxDimension
+    sourceSize.width: theme.chat.message.thumbnailWidth
+    sourceSize.height: theme.chat.message.thumbnailWidth
     width: Math.min(
         mainColumn.width - eventContent.spacing * 2,
         implicitWidth,
-        maxDimension,
+        theme.chat.message.thumbnailWidth,
     )
 
-    property int maxDimension: window.settings.messageImageMaxThumbnailSize
-
     TapHandler {
         onTapped: Qt.openUrlExternally(image.source)
     }