This is split from {T290262}.
[] {T299487}
[] {T299490}
[] Fix bugs T296463
[] Make sure screenreader users get the shortcuts explained when they are in the dialog, as explained in the note T290262#7457975.
[x] Make sure move and delete options are explained to screenreader users. ( covered by T289653, specifically T291284 )
[] Re-think screenreader instructions to move / delete. An item does not need to be selected to use this keyboard functionality, having it focused is enough. See T295353#7513913
[] Discuss if it makes sense to read out delete options on single template transclusions to screen reader users (while this is not transparent to non screen reader users ) see T295353
[x] {T294905}
===List of shortcuts for reference
|**Shortcut**|**Action**|
| {key Ctrl}Ctrl/{key Cmd}Cmd + {key Shift}Shift + {key up}/{key down} | Move a part in a multi-part template up/down, when selected in the sidebar|
| {key Ctrl}Ctrl/{key Cmd}Cmd + {key Del} | Deletes a part (wikitext or template), when selected in the sidebar |
| {key Ctrl}Ctrl/{key Cmd}Cmd + {key D} | Adds a template (possible if single or multi-part) |
| {key Ctrl}Ctrl/{key Cmd}Cmd + {key Shift}Shift + {key Y} | Adds a wikitext part |
| {key Ctrl}Ctrl/{key Cmd}Cmd + {key Shift}Shift + {key D} | Add undocumented parameter |