Fix top margin in empty versions list

Signed-off-by: Richard Steinmetz <richard@steinmetz.cloud>

apps/files_versions/src/css/versions.css

@@ -68,3 +68,7 @@
 	float: right;
 	margin-right: -10px;
 }
+
+.versionsTabView .emptycontent {
+	margin-top: 50px !important;
+}