A handy-dandy extension (Qlik Windows + Qlik SAS) you will use many times during app development, as it simply adds all columns of a selected data-model table to a standard Qlik Sense table object.
I use this extension dozens of times with every new app I create, because it allows me to look at a data-model table in full detail with just one click. If needed you can filter certain fields and field names prefixes (qualify ...) can be removed from the labels ...
I created this extension together with Ralf Becher (Vizlib).