Change default lastPaletteHeight to a larger number than 0.

[mooreorless555]

This is for that case where you click "Edit Project", do some stuff, then click "Save & Update", and you can't "see" the entity/decal palette anymore. From my experimenting, I think it turns out that lastPaletteHeight was setting the editor palette height to 0.

This doesn't root-cause the issue as to why lastPaletteHeight remains 0 on refresh, but it does fix the entity panel becoming hidden when you save and update your project.

[hubol]

An alternative way to fix might be to only set the element's height when lastPaletteHeight > 0

OgmoEditor3-CE/src/level/editor/Editor.hx

Line 471 in b2a5215

paletteElement.height(lastPaletteHeight);