I got the problem with display caption of components which are setEnabled to false - the caption for example is not visible or so much white:
I don't have this problem in Firefox.
Example above: I created a class which extends FormLayout and put some components like TextField, CheckBox, then the whole panel is setEnabled(false/true).
How can I make the caption visible in IE?
the solution for IE is set custom CSS style
.v-disabled {
opacity: black !important;
efilter: alpha(opacity=80);
}