Faster and more reliable implementation of drag cube generation. Improves overall loading times (both game load and scene/vessel/ship load times), prevent occasional lag spikes (in the editor mostly) and fix some issues causing incorrect drag cubes to be generated (notable examples are the stock inflatable heat shield, the 1.25m and 2.5m nose cones and the Mainsail shroud). Note that by design, this patch results in a small deviation from the stock behavior for buyoancy, aerodynamics and thermodynamics, as the generated drag cubes will be slightly different.

…while the generation for the previous part isn't finished during part compilation due to missing integration with the "framerate unlocked" part compilation of the FastLoader patch.

… when called on a part set to translucent (ie, detached part in the editor)