Bedleveling: X and Y must be Integers not Float!

#include "language_en.h" before the national language in language.h

https://github.com/Wurstnase/Marlin/blob/Development/Marlin/Configuration.h#L427

Fix for #1485

Update ultralcd_st7920_u8glib_rrd.h

Fixed delay-times during Init. REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER won't get initialized on some Boards because delay was to short.

Make display language configurable in Configuration.h

Include of language_en.h now behind national language.

All "#define MSG_STR_*" now surrounded by #ifndef and #endif.

+ May decrease the workload for feature developers. They may omit to
update all the language files but "language_en.h". When loading _en
first, all new features give some display, but the new in English.

- May throw some additional warnings about redefinition during compile.

Fan speed and 4th extruder on graphical LCD

- Display fan speed 0-1 as “—“ and 254-255 as “100%”.
- Display 4th extruder instead of the heated bed

Fix bad typo in ConfigurationStore.cpp

K8200: Example Configuration.h fixed

Example Configuration.h: fixed strange white characters preventing
compilation in lines 1 and 3 - oops

Unified menu selection - by hilighting - made first column avilable

K8200: Example Configurations back in sync and readme update

Example Configurations for K8200 readme.md updated
* readme.md: added description for german umlaut support on LCD

Example Configuration_adv.h for K8200 back in sync
* Configuration_adv.h: rebased and added missing changes for 4th
extruder

Example Configuration.h for K8200 back in sync
* Configuration.h: rebased and added missing changes
* Configuration.h: updated comments for K8200

New function now drops the prechar (select character) and makes the first
column usable for text.
Marking the line is now constantly made by highlighting (reverse).

Replaced selection code in:
lcd_implementation_drawmenu_generic()
_drawmenu_setting_edit_generic()
_drawmenu_sd()

with new function.

Apply some cleanup for recent merge

Apply fix for M600 filament change

Combine 1/(rows+1) with u8g.getHeight() to get rowHeight and just use
that.

Fixes issue #1447 - Overlapping of long descriptions with values.

- Patch from #1453 for delta movement plan
- Fix: Set X with code X instead of adding to X

Reworked bootsplash for DOGM displays another time - saved 1786 bytes

Adjust LCD_WIDTH to make better use of DOGM LCDs 2

Prework for issue #1448 and #1447

Will merge in when pull request #1457 is in.

Replaced calculation to centre bitmap with fixed values.
Saved 20 bytes.

and win another 1694 bytes.

No visible impact.

Fix HD44780 misspelled as HD44870

M200 cleanup, normalization of EXTRUDER loops