Update bootstrap and fix #1902

plugins/bootstrap/css/bootstrap-reboot.css

@@ -1,5 +1,5 @@
 /*!
- * Bootstrap Reboot v4.1.0 (https://getbootstrap.com/)
+ * Bootstrap Reboot v4.1.2 (https://getbootstrap.com/)
  * Copyright 2011-2018 The Bootstrap Authors
  * Copyright 2011-2018 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
@@ -17,14 +17,14 @@ html {
   -webkit-text-size-adjust: 100%;
   -ms-text-size-adjust: 100%;
   -ms-overflow-style: scrollbar;
-  -webkit-tap-highlight-color: transparent;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
 }
 
 @-ms-viewport {
   width: device-width;
 }
 
-article, aside, dialog, figcaption, figure, footer, header, hgroup, main, nav, section {
+article, aside, figcaption, figure, footer, header, hgroup, main, nav, section {
   display: block;
 }
 
@@ -160,7 +160,7 @@ pre,
 code,
 kbd,
 samp {
-  font-family: monospace, monospace;
+  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
   font-size: 1em;
 }
 
@@ -182,6 +182,7 @@ img {
 
 svg:not(:root) {
   overflow: hidden;
+  vertical-align: middle;
 }
 
 table {