PAUSE_MESSAGE_PAUSING not defined it's called PAUSE_MESSAGE_PARKING in pause.h

Build is breaking with "fatal error: qr_encode.h: No such file or
directory" due to an incorrect file case. The correct file name
listed at https://github.com/MKS-Sean/qr_encode/blob/master

 is
QR_Encode.h.

Fixes #124

Signed-off-by: Willian Rampazzo <willianr@gmail.com>

This reverts commit 81fc6b07.

Fix the impact of file transfer on BLTOUCH, fix the problem of wifi interface display when cloud service is not enabled

This reverts commit dae0cf84.

This reverts commit be3a45fd.

This reverts commit 6069e9c6, reversing
changes made to c61d33ab.

additional typos and errors

mks_ui sources modified for single extruder

mks_ui sources modified for 'more' menu

various typos and inconsistencies