feature #1330 Display source code using dark mode (javiereguiluz)

This PR was merged into the main branch.

Discussion
----------

Display source code using dark mode

Creating a "dark mode" style for this application is outside of the scope of the project, so we're not going to do it.

However, I propose to use a "dark mode" style to display the source code in the modal windows. In addition to being the most common style for developers, showing it in "dark mode" further emphasizes the difference between the application interface and its code:

**Before / After**

![code-highlight-comparison](https://user-images.githubusercontent.com/73419/166917649-3d4d30a3-6f31-4cdc-a834-bfb82528a72f.jpg)

Commits
-------

0e1ff29 Display source code using dark mode

assets/styles/app.scss

@@ -12,7 +12,7 @@ $lato-font-path: '~lato-font/fonts';
 @import "~bootswatch/flatly/bootswatch";
 @import "~@fortawesome/fontawesome-free/css/all.css";
 @import "~@fortawesome/fontawesome-free/css/v4-shims.css";
-@import "~highlight.js/styles/base16/solarized-light.css";
+@import "~highlight.js/styles/github-dark-dimmed.css";
 
 // pick the Lato fonts individually to avoid importing the entire font family
 @import '~lato-font/scss/public-api';

public/build/entrypoints.json

@@ -5,11 +5,11 @@
         "/build/runtime.96aa4ea2.js",
         "/build/755.f5cf308f.js",
         "/build/498.3bafb5f9.js",
-        "/build/979.4967399b.js",
-        "/build/app.a5511055.js"
+        "/build/347.099e0365.js",
+        "/build/app.f1db5e65.js"
       ],
       "css": [
-        "/build/979.dc75718b.css",
+        "/build/347.484d2f6c.css",
         "/build/app.f66338b0.css"
       ]
     },
@@ -46,9 +46,9 @@
     "/build/runtime.96aa4ea2.js": "sha384-nMYLpi/v3txwhZt8UOBsMOTbgVmUPlpD8cPmrU3yblZ7Yg8l799XS9NC1BZ9P9Xs",
     "/build/755.f5cf308f.js": "sha384-SAv+SyvZr31CmFrJFfKEYK0fDrMVx8vh19SI4QznAB/ar+Z1k6IT9Mg2SDZtLwD2",
     "/build/498.3bafb5f9.js": "sha384-yoQvBlSFO4jMdQIBvie1V5XQ4M8F0CGnS2mFtS9RslTqLbW8IYO/xONlip3SUDGH",
-    "/build/979.4967399b.js": "sha384-IPkjWWHEhfdos/b3w08uBZ2KjTFno/Ocwt1o6ardQjWJEbigWocfHbAeZfj+t7AX",
-    "/build/app.a5511055.js": "sha384-t5u9zzpbS+SwUVCOSeCZdoFdZ5n1rIZ5nWHPzaEYkZ6U2oaG2AOokBmGXzL7uORK",
-    "/build/979.dc75718b.css": "sha384-3Xq9zpkhbAPpNpmbJIfOIsDjVugU/PSQ4vcam/DSyD65+CvSOnCrlxkY+RpzfNKN",
+    "/build/347.099e0365.js": "sha384-OyxwFmS/gA7lb0u0BQeQneUmxS+yTASnmvhmTgNdO3J02ghh4ZO8/qFdtMl/AhLr",
+    "/build/app.f1db5e65.js": "sha384-FRTtq8dHuogsqAkbmJ1Jq759Fo/3RWXiUUWpdkAF0j+ZD/MRx1mWfJjXBd86qs2R",
+    "/build/347.484d2f6c.css": "sha384-ZOokpnTV8wl6Db+viUkheay5Zi+h5AxTIUfrHzDQQQGBbpxSydOT+j8E619FtN6U",
     "/build/app.f66338b0.css": "sha384-KA475JLog/ODk4eDLal8AC7va3Rpmyw4GCOfZJrhCxpm2B2itR0J3w1NAKF38hJ9",
     "/build/login.395771d5.js": "sha384-bKBy5bAsLAFHFo/zxqJkheRiwvRSVHXwogJPw7DWc6qfnP03VaNFMyEc/0cRBf0k",
     "/build/919.63ff4a5d.js": "sha384-0o9glCmkeYT/iE8RHdbPnoqMslSFjP/uN4ggsyjBVE5eq+V2RUFdEzYZBs5JNiyb",

public/build/manifest.json

@@ -1,6 +1,6 @@
 {
   "build/app.css": "/build/app.f66338b0.css",
-  "build/app.js": "/build/app.a5511055.js",
+  "build/app.js": "/build/app.f1db5e65.js",
   "build/login.js": "/build/login.395771d5.js",
   "build/admin.css": "/build/admin.691f9b8c.css",
   "build/admin.js": "/build/admin.587634ca.js",
@@ -9,8 +9,8 @@
   "build/755.f5cf308f.js": "/build/755.f5cf308f.js",
   "build/498.3bafb5f9.js": "/build/498.3bafb5f9.js",
   "build/919.63ff4a5d.js": "/build/919.63ff4a5d.js",
-  "build/979.dc75718b.css": "/build/979.dc75718b.css",
-  "build/979.4967399b.js": "/build/979.4967399b.js",
+  "build/347.484d2f6c.css": "/build/347.484d2f6c.css",
+  "build/347.099e0365.js": "/build/347.099e0365.js",
   "build/95.ce62c8da.js": "/build/95.ce62c8da.js",
   "build/images/fa-solid-900.svg": "/build/images/fa-solid-900.13de59f1.svg",
   "build/images/fa-brands-400.svg": "/build/images/fa-brands-400.216edb96.svg",