Fix scrollbar of participants list to be on right side

Signed-off-by: Jan-Christoph Borchardt <hey@jancborchardt.net>

css/style.scss

@@ -1077,10 +1077,16 @@ video {
 	padding-bottom: 0;
 }
 
-#app-sidebar #participantsTabView form,
-#app-sidebar #participantsTabView .participantWithList {
+/* Form needs margin, participant list needs padding
+ * So the form has margin from the right side, but the scroll bar of the
+ * participant list is directly on the right.
+ */
+#app-sidebar #participantsTabView form {
 	margin-right: 15px;
 }
+#app-sidebar #participantsTabView .participantWithList {
+	padding-right: 15px;
+}
 
 /**
  * Add a little margin to the last participant so the list is nicely framed with