primitive generator: add conditional lines to cylinders; improved bad color handling

Added history functionality for swapping

fixed: double-clicking an object and editing it that way would not register to history

when inlining (as an action), reinterpret the inlinees so that there's not any pointer mess-ups

more restyle/refactor

restyle..

Removed the two string arrays containing object types and icon names, moved these as LDObjects' virtual functions

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mercurial