Moodle App deprecations on 4.5 will be removed on 5.3

[crazyserver]

Hi!

We've found you are using CoreDomUtilsProvider.showModalLoading in your code that will be removed on 5.3.

mobileapp/mobile.js: return this.CoreDomUtilsProvider.showModalLoading('core.sending', true).then((modal) => {

You should use CoreLoadingsService.show instead.