Changed Media bubbles to tansparent bubbles

lib/api/marianumcloud/talk/chat/richObjectStringProcessor.dart

@@ -33,7 +33,7 @@ class RichObjectStringProcessor {
           return const Padding(padding: EdgeInsets.all(10), child: CircularProgressIndicator());
         },
         fadeInDuration: const Duration(seconds: 1),
-        imageUrl: "https://cloud.marianum-fulda.de/core/preview?fileId=${value.id}&x=110&y=-1&a=1",
+        imageUrl: "https://cloud.marianum-fulda.de/core/preview?fileId=${value.id}&x=100&y=-1&a=1",
         httpHeaders: {
           "Authorization": "Basic ${base64.encode(utf8.encode("${preferences.getString("username")}:${preferences.getString("password")}"))}"
         },