At the moment you can only do it by either changing Aware IM code directly or overriding it in a custom Javascript file.
If you do this, though, it will apply to ALL mobile queries in all your applications. If you want to do it for a particular query only let me know and maybe I will think of something. So to change the code directly open the file AwareIM/Tomcat/webapps/AwareIM/aware_kendo/parsers/customMobileParser.js and search for "AwareApp.Locale["CE_Cancel"]". You will find this:
var wc = {
cancel: AwareApp.Locale["CE_Cancel"],
command: function (o) {
me.onActionSheetClick (o);
}
};
Either remove the cancel property:
var wc = {
command: function (o) {
me.onActionSheetClick (o);
}
};
or change it:
var wc = {
cancel: "My Cancel",
command: function (o) {
me.onActionSheetClick (o);
}
};
Then make sure you clear the browser cache and refresh the browser