Add a "Copy branch name"

extension/manifest.json

@@ -17,6 +17,7 @@
       "js": [
         "scripts/external/jQuery.js",
         "scripts/pm/in_progress.js",
+        "scripts/pm/branch.js",
         "scripts/pm/commit_message.js",
         "scripts/pm/prepare_assigment.js"
       ]

extension/scripts/pm/branch.js

+(function($) {
+  var issueTitle = $('h2').attr('style', 'cursor: pointer');
+
+  issueTitle.on('click', function (e) {
+    var branchName = issueTitle.html().replace(' #', '-').toLowerCase();
+    var textfield = $('<input type="text" style="display: block;" value="' + branchName.replace(/"/g, '&quot;') + '">');
+    issueTitle.after(textfield);
+    textfield.select();
+    document.execCommand('copy');
+    textfield.remove();
+  });
+
+})(jQuery);