supertux editor questions

supertux-editor

General
 - I couldn't figure out how to undo
 - hover over tips/info on tiles, objects, and tools would be helpful
 - Some of the tile/object organization is challenging (ex: "Final Goal" 
   was not immediately easy to find). It would be cool if "required" objects 
   were either already on the level, or if they were in the object pane until 
   placed in the level. That is: things like spawn point and final goal have 
   constant presence in the window (either in the object pane or placed in the 
   level); since you absolutely need those things, but once they're placed, it's 
   never needed again.

Tilegroup/Object UI
 - Need some way to show what's currently selected (Tilegroup or Object)
 - Should default to a particular Tilegroup/Object, instead of always prompting 
   (last selected?)
 - I think a dropdown select makes more sense here. when I check/select tilegroup, 
   i'd rather just have a dropdown with a current selection that I can shift
 - When the objects/tiles are vertically larger than the screen, scrolling is 
   not apparent or easy (scroll bar/arrows?)

Tilegroup/Object non-UI
 - It was frustrating to figure out that I couldn't use the eraser to delete an 
   Object if my right panel was currently displaying a tilegroup. Seems like I 
   should be able to delete whatever I want, independent of what's currently active
   for placement.
 - While the developer in me appreciates having a tile AND object version of things 
   like blocks, it's confusing to place a block *tile* but then not be able to define 
   it's features (because it's not an object, presumably). Some way of making it 
   more clear that an entity is either the tile or object version might help here.
 - Related to above, when placing a tile, they have a snap-to-grid behavior. Objects 
   don't seem to have this, so making a series of coin blocks that are aligned was 
   tricky (might just be a config issue on my part?)