Improve support for copy and paste

[DeadMG]

TL;DR

Make copy-and-paste work like placing entity normally.

What?

Copying an entity should behave exactly like the player picking that entity from the crafting menu, except that when it is built it inherits configuration like filters. Currently it does not and there's many examples.

• Railgun turrets can only be rotated four ways, not eight. Additionally they do not show highlight of danger entities.
• Copying an asteroid collector doesn't show existing collectors' ranges.
• Copying a power pole, then dragging it, results in a constant line of power poles, rather than the automatically spaced line that occurs when you place them directly.
• Copying a splitter doesn't let you fast-replace belts

Why?

Copying and pasting an existing entity is often faster than opening the menu to choose it, especially if you want to preserve some setting or other. However it often doesn't exactly work as expected. The game would be a bit smoother to play if it worked as normal.