Patch v0.99.19

Map editor uploads now use a map screenshot as the cover (the screen display at the time of upload).
The map editor now supports spawn point grouping for configuring spawn points at different locations.
Fixed a bug where the effect range and visual range of permanent fortification were inconsistent.
Fixed a bug where enemies could sometimes pass directly through walls.
"Golems," "Frost Golems," and "Giant Mushy" now have resistance and cannot be directly devoured by the Dragonling.
Fixed a bug where the movement cost through walls was too low.
Fixed incorrect attack reduction for some upgrades in treasure chests, such as "Frost Missile."
Fixed incorrect attack boosts for some upgrades in treasure chests, such as "Giant Log."
Reduced the food bonus of "Cauldron Stew."
Increased the construction cost of the "Magic Cauldron."
Improved the attributes of "Bandits."
Limited custom map size to a maximum of 96*96.
"Trade Tax" now caps at a maximum of 100 gold.
Language selection can now be cycled in reverse using the right mouse button.
Removed map boundary restrictions.
Fixed a bug where the Bridgehead could take effect without requiring an upgrade.
Fixed a bug where the Demon Eye could cause a significant increase in unit movement speed.
The editor can now copy the month list for spawn points.
The healing effect of the Nature Well has been increased by 4 times, and the cooldown has been extended to 60 seconds.
The Dragonling's defense has been increased to 10.
The base production of mines has been increased by +1.