TIWjQDBGrid changing UI

[Comograma]

I managed to put the test case to work. Attached.
With RenderCDNFiles = False, hadded to the ExtraHeader of each form, these lines:

<link href="files/styles.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="funcoes.js"></script>

<link href="ui.jqgrid.min.css" rel="stylesheet" type="text/css"/>
<link href="jquery-ui.min.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.jqgrid.min.js"></script>

and this works 100% in all forms and after open/close the modal form. Grids are rendered. See the label "Picking de entrada" (and others) font/size do not change, as it should.
This way, my css file, styles.css is not ignored. Removed all loads from ServerController.OnCreate.
Couldn't figure it out a way to put those lines only in one place (for instance, ServerController). Is it possible? Tried on HTMLHeaders of ServerController but no go.

With RenderCDNFiles = True, couldn't find a way for this to work 100%, like I said before.
See the test case, please.

PS: Strange thing is happening: where running the test case in Debug mode, it will through a error