Update ExportLatex.js to convert '→'.

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

@@ -37,6 +37,7 @@ Ext.define('Dbui.grid.mixin.ExportLatex', {
         if (li.length === 0) {
             value = htmlEl.textContent.trim();
             value = value.replace(reLaTeX, "\\$&");
+            value = value.replace("→", "$\to$");
 
         // render the hyper link using latex command href
         } else {