Make about: pages more adaptive (MR 10)

Adds stylesheets for some "about:" pages, the pages were chosen depending
on importance for user.

preferences.css was moved to sidebar.css since changes in this file could
be applied for more pages and were related only to sidebar.

Adds copyrights

src/userContent/addons.css

@@ -0,0 +1,8 @@
+/* Copyright 2021 Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document url("about:addons"), url-prefix("about:addons") {
+    :root {
+        --section-width: min(664px, 100%) !important;
+    }
+}

src/userContent/config.css

@@ -0,0 +1,37 @@
+/* Copyright 2021 Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document url("about:config") {
+    #search-container,
+    #toolbar, #prefs {
+        min-width: 300px !important;
+    }
+
+    @media (max-width: 644px) {
+        #toolbar {
+            flex-direction: column;
+        }
+
+        #about-config-search {
+            max-width: 100%;
+        }
+
+        #prefs {
+            word-wrap: anywhere;
+        }
+
+        .checkbox-container {
+            margin-top: 5px;
+        }
+    }
+
+    @media (max-width: 500px) {
+        tr {
+            font-size: 12px;
+        }
+
+        th {
+            padding-left: 8px !important;
+        }
+    }
+}

src/userContent/license.css

@@ -0,0 +1,11 @@
+/* Copyright 2021 Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document url("about:license") {
+    @media (max-width: 500px) {
+        .license-header {
+            background-image: none !important;
+            padding-inline-end: unset !important;
+        }
+    }
+}

src/userContent/logins.css

@@ -0,0 +1,24 @@
+/* Copyright 2021 Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document url("about:logins") {
+    .container {
+        min-width: 300px !important;
+    }
+
+    @media (max-width: 700px) {
+        body {
+            --sidebar-width: 200px !important;
+            grid-template-columns: var(--sidebar-width) 1fr !important;
+        }
+
+        .edit-button, .delete-button {
+            font-size: 0 !important;
+            background-position: center;
+        }
+
+        #branding-logo {
+            display: none;
+        }
+    }
+}

src/userContent/policies.css

@@ -0,0 +1,11 @@
+/* Copyright 2021 Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document url("about:policies"), url-prefix("about:policies") {
+    @media (max-width: 830px) {
+        tbody.collapsible td,
+        .active-policies td {
+            word-wrap: anywhere;
+        }
+    }
+}

src/userContent/protections.css

@@ -0,0 +1,49 @@
+/* Copyright 2021 Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document url("about:protections") {
+    #report-content {
+        width: calc(100% - 16px) !important;
+        max-width: 800px !important;
+    }
+
+    /* hide element with Firefox for Android and iOS ad */
+    .lockwise-card .card-body,
+    #mobile-hanger {
+        display: none !important;
+    }
+
+    @media (max-width: 800px) {
+        #report-content {
+            margin: 16px 8px !important;
+        }
+
+        .icon {
+            width: 32px !important;
+            height: 32px !important;
+        }
+
+        .body-wrapper {
+            /* make trackers report to fill the entire card width */
+            grid-column-start: 1 !important;
+            grid-column-end: -1 !important;
+        }
+
+        #manage-protections,
+        #sign-up-for-monitor-link,
+        #save-passwords-button,
+        #get-proxy-extension-link {
+            /* move button on a separate row */
+            grid-area: 2 / 1 / 2 / 6 !important;
+        }
+
+        .card-header .wrapper {
+            grid-row-gap: 8px !important;
+        }
+
+        .card:not(.has-logins) .wrapper div:nth-child(1) {
+            /* make card title to use more width */
+            grid-column-end: -1 !important;
+        }
+    }
+}

src/userContent/rights.css

@@ -0,0 +1,11 @@
+/* Copyright 2021 Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document url("about:rights") {
+    @media (max-width: 500px) {
+        .rights-header {
+            background-image: none !important;
+            padding-inline-end: unset !important;
+        }
+    }
+}

src/userContent/sidebar.css

@@ -1,10 +1,19 @@
-@-moz-document url("about:preferences"), url-prefix("about:preferences") {
+/* Copyright 2021 plata, Anri Dellal
+   SPDX-License-Identifier: GPL-3.0-or-later */
+
+@-moz-document regexp("about:(preferences|addons|policies).*") {
+    .category-icon {
+        user-select: none !important;
+    }
+
     @media (max-width: 700px) {
         /* avoid that sidebar is too wide */
         :root {
             --in-content-sidebar-width: 50px !important;
+            --sidebar-width: 50px !important;
         }
 
+        /* reduce space around category icons */
         #categories > .category {
             margin-inline-start: auto !important;
             padding-inline: auto !important;
@@ -14,6 +23,7 @@
             display: none !important;
         }
 
+        /* reduce space around footer icons (addons, help) */
         .sidebar-footer-list {
             margin-inline: auto !important;
             padding-inline: auto !important;