Testpoints

[marmeladapk]

• SDA testpoint has silkscreen in pad
• LTM4644 has unlabeled testpoints
• Many testpoints do not have names of signals, only e.g "TP4" is written
• TP15, TP14 are under front panel

[gkasprow]

can't move TP15,TP16 away without breaking SI. Other issues were fixed