https://www.tutorialspoint.com/extjs/components_form.htm - done reading
https://hub.packtpub.com/loading-submitting-and-validating-forms-using-ext-js-4/ - done reading
https://www.extjs-tutorial.com/extjs-examples/crud-in-extjs-4-form-using-load-and-submit-example
https://www.extjs-tutorial.com/extjs/crud-in-extjs-form-using-load-and-submit
https://alvinalexander.com/source-code/software-dev/good-sencha-extjs-form-example-vtypes-password-submit-enter-buttons-submit
https://alvinalexander.com/source-code/software-dev/sencha-extjs-form-panel-extformpanel-example-using-hbox-layout-and-checkbox
http://www.catchmycity.com/tutorial/sencha-extjs-form-validation-custom-validation-handling-data_17
http://existdissolve.com/2012/04/extjs-4-applying-model-validations-to-forms/
https://alvinalexander.com/source-code/software-dev/good-sencha-extjs-form-example-vtypes-password-submit-enter-buttons-submit
https://stackoverflow.com/questions/35874949/how-to-create-a-warning-form-field-validator-in-extjs6
https://www.extjs-tutorial.com/extjs/extjs-model
https://www.mysamplecode.com/2012/03/extjs-validate-form-fields-vtype.html
http://devjs.eu/en/ext-js-4-custom-validation-vtype-for-validating/
https://docs.sencha.com/extjs/6.0.2/guides/components/forms.html
https://docs.sencha.com/extjs/6.2.0/classic/Ext.form.Panel.html
https://docs.sencha.com/extjs/6.5.1/classic/Ext.form.Labelable.html
https://docs.sencha.com/extjs/6.2.0/classic/Ext.layout.container.VBox.html
https://stackoverflow.com/questions/8124582/create-simple-extjs-form?rq=1
https://stackoverflow.com/questions/17248209/extjs-form-validation-before-submit
https://stackoverflow.com/questions/18357197/create-form-by-ext-formpanel
https://www.youtube.com/watch?v=TyqHlNB51MQ
https://www.youtube.com/watch?v=l0KreSR_9NY
https://www.youtube.com/watch?v=_PJkmEciwyY
Common xtypes for form elements
Examples
Other
Validations
Loading data
Submitting data
File upload
