Fix: fix planting-related desync

[SamuZad]

This PR fixes #179, by implementing:

1. Improving planting by passing height
2. Making sure that the preview hides "preview plants" if the other player has no reason to see them (ie they are on a lower level or are not in "planting mode)

Without item 2, the fix would look like this:

planting_fix.mp4

Reproducing the issue

1. Use the save file below
2. Navigate to the area shown in the screenshot
3. Have 1 player set their layer visibility to 9, while the other player should be looking at the place in the screenshot
4. The player "on top" should plant above
5. Plants will show up at layer 9

planting.zip