Fix jj40 capslock and minor keymap updates (#3168)

Fix jj40 capslock and minor keymap updates (#3168)

* Adjust TAPPING_TERM to make accessing the nav layer easier

* JJ40: Add RESET key to lower layer.

* Disable all lock LEDs on "oscillope" keymap.

I'm not 100% sure why yet, but attempting to turn on a lock LED on my v1
JJ40 PCB causes the PCB to become unresponsive. The easy fix is to just
disable all of the lock LEDs, since I don't have any LEDs on my keyboard
anyway.
Many thanks to u/wanleg on Reddit for suggesting this fix: https://www.reddit.com/r/olkb/comments/8en8f1/strange_caps_lock_behavior/e06kcaf/