fdo#81801 add first and third quartile to "Descriptive Statistics"

Change-Id: I7bfdb02a97d6a33c0a6e16b058cbb10b8ab2869b
Make room for more IDs and rename common IDs in Statistics dialogs

Change-Id: I0c7c28ef77676f8bcb6cf66423d30e3ea164a5bc
fdo#74669 Add z-test Statistics Dialog

Change-Id: I8169e9ceefc48c06b358d5a8e1fc08dabf019eb3
t-test & F-test Statistics dialog: rename VAR -> VARIABLE

Change-Id: I51fb7cb025f4dc2bb7f3bf0ba5c9b8ee90298cd8