Found some bugs

Hi I found some bugs I guess.

  1. The researcher, when I load the game his researches always stop and have to be order again, if forget then he will stand there doing nothing.
  2. My miner’s wooden pickaxe sometimes after loading it return back to the toolrack, so I have to always check whether he is holding his pickaxe or not after every loading.
  3. For farmer, sometimes if he is sowing seed and he want to go plant another crop after finish sowing no plants grow. Like I order hip to sow potato, after finish sowing he walk to sow tomato or harvest crop, some time the potato plant don’t appear.