fix: call showModalDialog inside another function

Prevent showModalDialog from breaking when used inside another function.

Reference: #41

Author: MARCO AURELIO MESSA

showModalDialog.js

@@ -144,7 +144,7 @@
         dialog.addEventListener('close', function() {
             var returnValue = lastDialog.querySelector('#dialog-body').contentWindow.returnValue;
             dialogDocument.body.removeChild(dialog);
-            nextStmts[0] = nextStmts[0].replace(new RegExp('(window\.)?' + callerName + '\(.*\)' , 'g'), JSON.stringify(returnValue));
+            nextStmts[0] = nextStmts[0].replace(new RegExp('(window\.)?' + callerName + '.*(\\).*)$' , 'g'), JSON.stringify(returnValue) + "$2");
             var decodedStmts = nextStmts.join('\n').replace(/^function\s+\(\s*\)\s*{/, '');
             var unopenedBraces = (decodedStmts.match(/}/g) || []).length - (decodedStmts.match(/{/g) || []).length;
             var openBraces = repeat('{', unopenedBraces);