ui: Drop fonts-fork-awesome as dependency

Closes: #2343.

- SVG icons from the project have been imported into the static/theme/icons
directory. In future, more icons from this and projects will be included in this
directory. We no longer use glyphicons from a font file.

- SVG icons are more flexible as we can mix and match icons from different
projects like fork-awesome. Each file can be individually tweaked to our needs.

- They do not get anti-aliased like icons from font files.

- They could end being much smaller than a font file which usually 100KiB+. Only
icons used on a page are included in the page.

- They work when font resources are blocked for security reasons like in case of
NoScript extension.

- They don't require separate resource to be loaded as SVG is typically inlined
in the HTML file. This should improve page load time.

- They can be animated and tweaked with CSS/JS.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

debian/control

@@ -78,7 +78,6 @@ Depends:
  bind9-dnsutils,
  curl,
  debconf,
- fonts-fork-awesome,
 # sgdisk is used in storage app to expand GPT disks
  gdisk,
  gettext,

plinth/menu.py

@@ -24,14 +24,14 @@ class Menu(app.FollowerComponent):
         name is the label of the menu item.
 
         icon is the icon to be displayed for the menu item. Icon can be the
-        name of a glyphicon from the Fork Awesome font's icon set:
-        https://forkawesome.github.io/Fork-Awesome/icons/. In this case, the
-        icon name starts with the string 'fa-'. Alternatively, the icon can
-        also be a file under the directory plinth/modules/<app>/static/icons/,
-        provided without an extension. SVG icons are preferred. Currently, both
-        PNG and SVG icons with the same name are used. For example, if the
-        value of icon is 'myicon' and app_id in App class is 'myapp', then two
-        icons files plinth/modules/myapp/static/icons/myicon.svg and
+        name of an SVG icon from the static/theme/icons directory. In this
+        case, the icon name starts with the string 'fa-' (a tribute to the
+        fork-awesome project). Alternatively, the icon can also be a file under
+        the directory plinth/modules/<app>/static/icons/, provided without an
+        extension. SVG icons are preferred. Currently, both PNG and SVG icons
+        with the same name are used. For example, if the value of icon is
+        'myicon' and app_id in App class is 'myapp', then two icons files
+        plinth/modules/myapp/static/icons/myicon.svg and
         plinth/modules/myapp/static/icons/myicon.png are used in the interface.
 
         tags is a list of tags that describe the app. Tags help users to find

plinth/templates/base.html

@@ -52,7 +52,6 @@
 
   <!-- Stylesheets -->
   <link rel="stylesheet" href="{% static '/javascript/bootstrap5/css/bootstrap.min.css' %}">
-  <link rel="stylesheet" href="{% static '/javascript/fork-awesome/css/fork-awesome.css' %}">
   <link rel="stylesheet" href="{% static 'theme/css/main.css' %}">
   {% if user_css %}
     <link rel="stylesheet" href="{% static user_css %}">