Fix "Call to undefined function xy()" issue in generate:plugin:field command.  #1885 (#2139)
Fix "Call to undefined function xy()" issue in generate:plugin:field command.  #1885 (#2139)

* Fix select field issue in generate:form:config command. Fix: #2111

* Improve askEmpty() method's documentation. Fix: #2111

* Fix "Call to undefined function xy()" issue in generate:plugin:field command.
 #1885

revagomes/DrupalConsole,revagomes/DrupalConsole,revagomes/DrupalConsole