26w26b: Hotfixes

Some more hotfixes.

Improvements:

• Help message when trying to build the Wind Turbine on ships or stations, explaining it must be placed on ground entities.

Bugfixes:

• Fixed legacy rock and stone brick item colors not always matching their material bucket tint.

• Fixed help message mergeTime deduplication not working (messages could repeat every few seconds).

• Fixed assembler not pushing finished products while its queue is active #7847.

Thanks for playing!