Create: Gravis's Flying Hotfixes

Three new fixes for Create Fly, found with the paint pitchers of the Create Fly ports of Steam 'n' Rails (a Spout never filled them). Same requirements as 1.0.0. Server tests pass on Create Fly 26.2-rc-2-6.0.9-1 and on 26.2-6.0.9-2.

• Items that hold fluid through a Fabric Transfer single-slot storage could never be filled by a Spout: Create Fly worked out the capacity of such a storage with the comparison turned around (if (max > capacity)), so every one reported a capacity of 0 and the Spout never started. Found with the Steam 'n' Rails paint pitchers; it now fills them.
• A Spout ignored a stack of two or more of those items (one empty paint pitcher was filled, five in a stack were left untouched). It now asks "how much fits?" about one item, as it already does when it fills, so stacks are filled one at a time like glass bottles.
• Slotted Fabric Transfer item storages reported a stack limit of 0 for the same reason (measured with a plain 9-slot container: 0 instead of 64). The value is now correct; no in-game effect has been observed.

The six fixes of 1.0.0 are unchanged. If Create Fly fixes any of these, the matching fix here is skipped or can be removed.