Show latex source in context items

Change-Id: I32af1c13c31dc0f94434daa4a4db8c94a7033582

extension.json

@@ -164,6 +164,7 @@
 				"ve-math/ve.ui.MWLatexDialog.css",
 				"ve-math/ve.ce.MWLatexNode.css",
 				"ve-math/ve.ui.MWLatexInspector.css",
+				"ve-math/ve.ui.MWLatexContextItem.css",
 				"ve-math/ve.ui.MWLatexPage.css"
 			],
 			"dependencies": [

modules/ve-math/ve.ui.MWLatexContextItem.css

@@ -0,0 +1,13 @@
+/*!
+ * VisualEditor UserInterface MWLatexContextItem styles.
+ *
+ * @copyright 2011-2015 VisualEditor Team and others; see AUTHORS.txt
+ * @license MIT
+ */
+
+.ve-ui-mwLatexContextItem .ve-ui-linearContextItem-body {
+	/* Specify a valid second value to fix size in Chrome/FF */
+	font-family: monospace, 'Courier';
+	white-space: pre-wrap;
+	max-height: 10em;
+}

modules/ve-math/ve.ui.MWLatexContextItem.js

@@ -63,3 +63,10 @@ ve.ui.MWLatexContextItem.prototype.getCommand = function () {
 		this.context.isMobile() ? this.constructor.static.inlineEditCommand : this.constructor.static.commandName
 	);
 };
+
+/**
+ * @inheritdoc
+ */
+ve.ui.MWLatexContextItem.prototype.getDescription = function () {
+	return ve.ce.nodeFactory.getDescription( this.model );
+};