Update python.org socialize menu to include a link to the PSF Mastodo…

…n account (#2323)

* Update python.org socialize menu to include a link to the PSF Mastodon account

Updated socialize menu to include a link to the official PSF Mastodon account.

Details:

- Added Mastodon icon to Pythonicon font family. Used IcoMoon to generate icons
- Updated all related CSS and Sass files
- Updated the socialize menu in the base.html template

To see all rendered Pythonicon fonts, open `static/fonts/demo.html`

* Updated help and close icons unicodes

Help icon is now assigned unicode `\3f` (`?`). Close icon is now assigned unicode `\58` (`X`). Required regenerating fonts and updating CSS + Sass files.

static/fonts/demo/demo.css

@@ -0,0 +1,155 @@
+body {
+  padding: 0;
+  margin: 0;
+  font-family: sans-serif;
+  font-size: 1em;
+  line-height: 1.5;
+  color: #555;
+  background: #fff;
+}
+h1 {
+  font-size: 1.5em;
+  font-weight: normal;
+}
+small {
+  font-size: .66666667em;
+}
+a {
+  color: #e74c3c;
+  text-decoration: none;
+}
+a:hover, a:focus {
+  box-shadow: 0 1px #e74c3c;
+}
+.bshadow0, input {
+  box-shadow: inset 0 -2px #e7e7e7;
+}
+input:hover {
+  box-shadow: inset 0 -2px #ccc;
+}
+input, fieldset {
+  font-family: sans-serif;
+  font-size: 1em;
+  margin: 0;
+  padding: 0;
+  border: 0;
+}
+input {
+  color: inherit;
+  line-height: 1.5;
+  height: 1.5em;
+  padding: .25em 0;
+}
+input:focus {
+  outline: none;
+  box-shadow: inset 0 -2px #449fdb;
+}
+.glyph {
+  font-size: 16px;
+  width: 15em;
+  padding-bottom: 1em;
+  margin-right: 4em;
+  margin-bottom: 1em;
+  float: left;
+  overflow: hidden;
+}
+.liga {
+  width: 80%;
+  width: calc(100% - 2.5em);
+}
+.talign-right {
+  text-align: right;
+}
+.talign-center {
+  text-align: center;
+}
+.bgc1 {
+  background: #f1f1f1;
+}
+.fgc1 {
+  color: #999;
+}
+.fgc0 {
+  color: #000;
+}
+p {
+  margin-top: 1em;
+  margin-bottom: 1em;
+}
+.mvm {
+  margin-top: .75em;
+  margin-bottom: .75em;
+}
+.mtn {
+  margin-top: 0;
+}
+.mtl, .mal {
+  margin-top: 1.5em;
+}
+.mbl, .mal {
+  margin-bottom: 1.5em;
+}
+.mal, .mhl {
+  margin-left: 1.5em;
+  margin-right: 1.5em;
+}
+.mhmm {
+  margin-left: 1em;
+  margin-right: 1em;
+}
+.mls {
+  margin-left: .25em;
+}
+.ptl {
+  padding-top: 1.5em;
+}
+.pbs, .pvs {
+  padding-bottom: .25em;
+}
+.pvs, .pts {
+  padding-top: .25em;
+}
+.unit {
+  float: left;
+}
+.unitRight {
+  float: right;
+}
+.size1of2 {
+  width: 50%;
+}
+.size1of1 {
+  width: 100%;
+}
+.clearfix:before, .clearfix:after {
+  content: " ";
+  display: table;
+}
+.clearfix:after {
+  clear: both;
+}
+.hidden-true {
+  display: none;
+}
+.textbox0 {
+  width: 3em;
+  background: #f1f1f1;
+  padding: .25em .5em;
+  line-height: 1.5;
+  height: 1.5em;
+}
+#testDrive {
+  display: block;
+  padding-top: 24px;
+  line-height: 1.5;
+}
+.fs0 {
+  font-size: 16px;
+}
+.fs1 {
+  font-size: 32px;
+}
+.fs2 {
+  font-size: 24px;
+}
+

static/fonts/demo/demo.js

@@ -0,0 +1,30 @@
+if (!('boxShadow' in document.body.style)) {
+    document.body.setAttribute('class', 'noBoxShadow');
+}
+
+document.body.addEventListener("click", function(e) {
+    var target = e.target;
+    if (target.tagName === "INPUT" &&
+        target.getAttribute('class').indexOf('liga') === -1) {
+        target.select();
+    }
+});
+
+(function() {
+    var fontSize = document.getElementById('fontSize'),
+        testDrive = document.getElementById('testDrive'),
+        testText = document.getElementById('testText');
+    function updateTest() {
+        testDrive.innerHTML = testText.value || String.fromCharCode(160);
+        if (window.icomoonLiga) {
+            window.icomoonLiga(testDrive);
+        }
+    }
+    function updateSize() {
+        testDrive.style.fontSize = fontSize.value + 'px';
+    }
+    fontSize.addEventListener('change', updateSize, false);
+    testText.addEventListener('input', updateTest, false);
+    testText.addEventListener('change', updateTest, false);
+    updateSize();
+}());