949 fallback (#1122)

feature(frontend): fallback bt4 upgrade

issue #993 and #949

etc/fallback.txt

@@ -15,3 +15,4 @@ bootstrap/ https://github.com/twbs/bootstrap/releases/download/v4.3.1/bootstrap-
 ../img/version-$version-brightbreen.svg wget https://img.shields.io/badge/version-$version-brightgreen.svg
 ../img/latest.svg https://readthedocs.org/projects/ravada/badge/?version=latest
 ../img/License-AGPL%20v3-blue.svg https://img.shields.io/badge/License-AGPL%20v3-blue.svg
+https://download.cksource.com/CKEditor/CKEditor/CKEditor%204.12.1/ckeditor_4.12.1_standard_easyimage.zip

templates/bootstrap/header.html.ep

@@ -16,6 +16,7 @@
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.7/css/bootstrap-select.css">
     <link href="https://use.fontawesome.com/releases/v5.0.7/css/all.css" rel="stylesheet">
     <link href="https://cdnjs.cloudflare.com/ajax/libs/intro.js/2.7.0/introjs.css" rel="stylesheet" type="text/css">
+    <script src="https://cdn.ckeditor.com/4.11.3/standard/ckeditor.js"></script>
 % } else {
     <link rel="stylesheet" href="/fallback/morris.js/morris.css">
     <link rel="stylesheet" href="/fallback/bootstrap-4.3.1-dist/css/bootstrap.min.css" type="text/css">
@@ -23,6 +24,7 @@
     <link rel="stylesheet" href="/fallback/bootstrap-select-1.13.9/dist/css/bootstrap-select.css" type="text/css">
     <link rel="stylesheet" href="/fallback/fontawesome-free-5.10.1-web/css/all.css" type="text/css">
     <link rel="stylesheet" href="/fallback/intro.js/bin/introjs.css" type="text/css">
+    <script src="/fallback/ckeditor/ckeditor.js"></script>
 % }
 
 % foreach my $csslink (@$css) {