Prevent save a cell when SHIFT + Enter is activated.
Add a progressBar method to replace beginReq endreq methods
Use progressBar in beginReq endReq functions and delete the not needed code
use progressBar in inline edit. add two new parameters in  saveRow - saveui to descripe how to display the message and savetext - the message
Using progressBar in cellEdit
Enable the submit button in editGridRow and delGridRow immediate when complete ajax event raises
Fix displaying sort icon in the first column

If no additional column are added (by `rownumbers: true` for example) and no `sortname` are defined (so the default `sortname: ""` and `lastsort: 0` are used) then the sorting icon will be wrong displayed in the first column.

[The demo](http://www.ok-soft-gmbh.com/jqGrid/gridWithoutSort0.htm) can be used to reproduce the problem. [Another demo](http://www.ok-soft-gmbh.com/jqGrid/gridWithoutSort1.htm) uses the suggested fix and it seems work correctly.
Merge pull request #624 from OlegKi/master

Fix displaying sort icon in the first column in case of unsorted grid