`FORCE_INLINE` seems to have no effect on code generation with standard
optimization.

- `DEFAULT_LCD_CONTRAST` was incorrectly overriding all `DOGLCD`
- `MINIPANEL` conditionals are identical to `MAKRPANEL`

- In `stepper.h` init `count_direction` array
- In `ultralcd.cpp` init `autotune_temp` array

The LCD menu items for SD printing pause/stop have been updated to control
also the print job timer. This commit also fixes a small output bug with
M78, the failed print counter was displaying the wrong value.

All credits to RicardoGA

PrintCounter classes

Extend M421 with I and J parameters

Remove SF_ARC_FIX from G5 (Cubic B-spline).
SF_ARC_FIX is a fix for G2/G3 (arcs) where Skeinforge always produced relative instead of absolute coordinates for the endpoint of an arc.
It's very unlikely this is also a problem with Cubic B-splines. More likely is copying from the G2/G3 code.

No compromises for the manage_heater(). manage_heater() will return immediately when there is nothing to do, but needs a constant detaT to work proper.
Calling idle() only every 200ms results in a display update every ~2 seconds - that should be enough.
For the other functionalities in idle() and manage_inactivity() 200ms is a lot but hopefully works.

Speedup sreen update delay
and correct a comment.

A module division by 10 is slooooow. (powers of 2 are fast - but then you can AND a bitmask with the same result)

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Minor DELTA segmentation speedup by pulling calculations out of the loop.