[Bug] [HighwayTools] Lava Source Patching is buggy about client

[EnigmA-008]

Ideas

1. It works almost all the time fine if the lava soure is one of the blocks that have to be mined (i.e. while extending a 3x3 tunnel to 4x6). the bot scans the blocks to be mined and marks the lava block in purple, netherrack in red. it tries to replace the purple block first. maybe this scan needs to be extended so that the bot scans the blocks that have to be mined and the surrounding blocks, find the lava and fixes it:
   

2. The bot tries fix floating lava, maybe it helps to fix the source block with high prio. trying to fix the floating lava may result in more floating lava.

3. Have an option (toggleable) that pings the player (same ping than out of picks/echests) if lava has been detected in the next build repeat so that the player can find fix it manually. Bot scans the environment, detect lava (purple) and ping the player (automatic #b pause) The schematic also has to check the blocks around the current schematic (see 1.). After the player has fixed the lava the player can execute #b resume to go on.