v8 Build 159.7

• Fixed conveyors not appearing in schematic previews under certain conditions
• Fixed Android file browser not exporting with correct extension
• Fixed data audio view file name going out of bounds
• Fixed logic editor being laggy on mobile devices
• Fixed "unit can't build" text staying in the build menu in certain situations
• Made modded sector presets generate outlines by default
• Added internal rule for block placement limits per-type (no UI yet, only usable by servers/console edits; this can be used for things like limiting number of processors in a map to reduce lag)
• Added support for opening schematics/saves/maps from the file browser on Android and iOS