- 'Sort alphabetically' sorts the shortcuts from right to left or if it is meant from left to right descending.
That's by design. For a Drawer at the left screen edge, icons go from right to left 'into' the screen edge, that is, the first icon is always the one closer to the tab.
- If I choose not to show the icon descriptions it should free that space, not reserve it nevertheless
And it does free that space. Anyway a screenshot with and without would be nice for me to understand what you are seing.
Also, exactly what setting are you using not to show the icon descriptions/labels in the Drawer? Should be Drawer Properties -> Appearance -> Set 'How many lines of text...' to 'No label'.
- I cannot add new content (new tab ?) to a drawer, all buttons are greyed out
Unlike a Shelf, which can have multiple tabs, a Drawer by nature only has a single tab and you cannot add more. If you want something with several tabs, use a Shelf instead.
Now, Drawers actually used the same code as Shelves (you can say it's a Shelf in a different mode). Because of this, they also use the same Property dialogs, where the word 'Shelf' is replaced by 'Drawer' and some specific settings are modified, removed or disabled.
In the case of the Contents tab, I played with the idea of actually removing the 'New', 'Insert', etc, buttons by making them invisible (as they only make sense when dealing with Shelves) but that looked a bit odd. In retrospective, if it confuses users perhaps I should make them invisible or simply use a different dialog altogether.