Set tabindex=-1 for buttons in WYSIWYG editor

The buttons are simply skipped with tab key. Switching between form
fields using keyboard only is much easier now.

oscar/static/oscar/js/bootstrap-wysihtml5/bootstrap-wysihtml5-0.0.2.js

@@ -3,7 +3,7 @@
 
 	var templates = {
 		"font-styles": "<li class='dropdown'>" +
-							"<a class='btn dropdown-toggle' data-toggle='dropdown' href='#'>" +
+							"<a class='btn dropdown-toggle' data-toggle='dropdown' href='#' tabindex='-1'>" +
 								"<i class='icon-font'></i>&nbsp;<span class='current-font'>Normal text</span>&nbsp;<b class='caret'></b>" +
 							"</a>" +
 						    "<ul class='dropdown-menu'>" +
@@ -14,17 +14,17 @@
 						"</li>",
 		"emphasis":     "<li>" +
 							"<div class='btn-group'>"
-                  + "<a class='btn' data-wysihtml5-command='bold' title='CTRL+B'><i class='icon-bold'></i></a>"
-                  + "<a class='btn' data-wysihtml5-command='italic' title='CTRL+I'><i class='icon-italic'></i></a>"
+                  + "<a class='btn' data-wysihtml5-command='bold' title='CTRL+B' tabindex='-1'><i class='icon-bold'></i></a>"
+                  + "<a class='btn' data-wysihtml5-command='italic' title='CTRL+I' tabindex='-1'><i class='icon-italic'></i></a>"
 							    //,+ "<a class='btn' data-wysihtml5-command='underline' title='CTRL+U'>Underline</a>"
 							+ "</div>"
 						+ "</li>",
 		"lists": 	"<li>"
 						+ "<div class='btn-group'>"
-						+ "<a class='btn' data-wysihtml5-command='insertUnorderedList' title='Unordered List'><i class='icon-list'></i></a>"
-						    + "<a class='btn' data-wysihtml5-command='insertOrderedList' title='Ordered List'><i class='icon-th-list'></i></a>"
-						    + "<a class='btn' data-wysihtml5-command='Outdent' title='Outdent'><i class='icon-indent-right'></i></a>"
-						    + "<a class='btn' data-wysihtml5-command='Indent' title='Indent'><i class='icon-indent-left'></i></a>"
+						+ "<a class='btn' data-wysihtml5-command='insertUnorderedList' title='Unordered List' tabindex='-1'><i class='icon-list'></i></a>"
+						    + "<a class='btn' data-wysihtml5-command='insertOrderedList' title='Ordered List' tabindex='-1'><i class='icon-th-list'></i></a>"
+						    + "<a class='btn' data-wysihtml5-command='Outdent' title='Outdent' tabindex='-1'><i class='icon-indent-right'></i></a>"
+						    + "<a class='btn' data-wysihtml5-command='Indent' title='Indent' tabindex='-1'><i class='icon-indent-left'></i></a>"
 						+ "</div>"
 					+ "</li>",
 
@@ -44,7 +44,7 @@
 							+ "</div>"
 						+ "</div>"
 
-					+ "<a class='btn' data-wysihtml5-command='createLink' title='Link'><i class='icon-share'></i></a>"
+					+ "<a class='btn' data-wysihtml5-command='createLink' title='Link' tabindex='-1'><i class='icon-share'></i></a>"
 
 					+ "</li>",
 
@@ -64,14 +64,14 @@
 							+ "</div>"
 						+ "</div>"
 
-						+ "<a class='btn' data-wysihtml5-command='insertImage' title='Insert image'><i class='icon-picture'></i></a>"
+						+ "<a class='btn' data-wysihtml5-command='insertImage' title='Insert image' tabindex='-1'><i class='icon-picture'></i></a>"
 
 					+ "</li>",
 
 		"html":
 						"<li>"
 							+ "<div class='btn-group'>"
-								+ "<a class='btn' data-wysihtml5-action='change_view' title='Edit HTML'><i class='icon-pencil'></i></a>"
+								+ "<a class='btn' data-wysihtml5-action='change_view' title='Edit HTML' tabindex='-1'><i class='icon-pencil'></i></a>"
 							+ "</div>"
 						+ "</li>"
 	};