A comment on Ext.AbstractComponent's ui config implies that 4.1.3 will now accept String arrays.
I still getting the behavior he is describing, despite the fact that it says it has been fixed in 4.1.3. I did debug and addUIToElement() and removeUIFromElement() are not accounting for arrays. Did you mean that you fixed the doc or that you fixed the code?"Passing a String array doesn't seem to have the desired effect. On a component, if I set ui to ['custom1', 'custom2'], the classes added are "x-component-custom1,custom2". That is, "custom2" is separated by a comma instead of a space and doesn't get the "x-component" prefix."
Is this something that you guys will be doing in the future? Are there any available options if I want to have hooks to multiple mixins?