Normalise C&K switch names and fix pinout

Fixes: #759 (closed)

This has a few fixes:

• Format update in first commit to simplify diffs
• Rename CuK ("C und K", I suppose) to CK in names and "C&K" in the descriptions, like other parts
• Fix 0.2mm silkscreen clearances where needed, plus silk in front of R/A part where it may hit board edges
• Minor KLC adjustments for ref des positions
• Pin 1 update (I'm not sure the pin 1 matters much on this part, as at least the vertical one is 180-degree rotatable but it was there before)

Then also:

• Swap pins 4 and 6 - otherwise it's not compatible with the standard Slide_DPDT symbol (it was following the DS pinning)

CK DS:

Symbol:

FP before:

FP now: