Update ExportLatex.js to handle LaTeX special character.

.gitignore

 *~
+.directory
 .project
 *.pyc
 .pydevproject

static/plugin_dbui/src/grid/mixin/ExportLatex.js

@@ -25,6 +25,7 @@ Ext.define('Dbui.grid.mixin.ExportLatex', {
         var htmlEl = domEl.dom,
             href,
             li,
+            reLaTeX = /[&#{_}$%]/g,
             value;
 
         // is the cell contains an hyper link
@@ -32,8 +33,10 @@ Ext.define('Dbui.grid.mixin.ExportLatex', {
 
         // standard string
         // shrink empty string to avoid latex processing failure
+        // handle latex special character
         if (li.length === 0) {
             value = htmlEl.textContent.trim();
+            value = value.replace(reLaTeX, "\\$&");
 
         // render the hyper link using latex command href
         } else {