Gnumeric 1.12.56

Hubert Figuière:
	* Fix tooltip problem on Wayland.

Morten:
	* FLOOR, CEILING: Improve xl compatibility.  [#703]
	* Fix dependency problems with arrays.  [#725] [#647]
	* Improve clipboard pasting from firefox.  [#733]
	* Fix number-stringification for E-numbers.  [#719]
	* Improve generation of random integers.
	* Work around cairo performance problem re anting.  [#736]

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