[OPEN-1079] In Opera Tab button does not switch focus on some filelds

[minspect]

I have noticed that Tab button is not working correctly with some form fields in Opera.

http://www.sencha.com/deploy/dev/examples/form/dynamic.html
Find an email field, click on it, and press Tab. Nothing happens...

Same thing with numeric fields.

I'm using Opera 10.6 beta on Windows Vista.

[Condor]

Not only Tab, but most special keys like Backspace, Left and Right also don't work.

Opera 10 fires keypress events for special keys, so you need:

Ext.override(Ext.form.TextField, {
filterKeys : function(e){
if(e.ctrlKey){
return;
}
var k = e.getKey();
if((Ext.isGecko || Ext.isOpera) && (e.isNavKeyPress() || k == e.BACKSPACE || (k == e.DELETE && e.button == -1))){
return;
}
var cc = String.fromCharCode(e.getCharCode());
if(!Ext.isGecko && e.isSpecialKey() && !cc){
return;
}
if(!this.maskRe.test(cc)){
e.stopEvent();
}
}
});