Revert "Increase the abyss rune chance on levels A:4 and A:5"

As pointed out in #8906, this commit actually decreased the rune chance
on all levels.

This reverts commit b33f7a63b51833bf6587609a29efdcc2c40cfa2e.

(cherry picked from commit f9fd0fee174c523c57210533726669a2d6f17459)
Tutorial 5: Move a tutorial message spot away from a door.

(cherry picked from commit 996e5b4fd49cb63e784d58866df269c64addcbeb)
Remove a reference to jewellery identification in a hint.

(cherry picked from commit c6f12671932b0a33297a34dfe90494a93c562c1f)
Correct some hints: stairs can be taken with a click, no need to shift.

(cherry picked from commit f7a7fb11d394ce94bac00641a9d71d973f8a35e2)
Hints: remove a warning about monsters picking up items.

(cherry picked from commit 92ebc40b0f9b7a618165494ac7ca7cc9d90d20e8)
Use $cmd lookup for a command in a hint

(cherry picked from commit 5df91cfe443cbc1e4e243df748246c149b6d4cef)