Update conflicting mnemonics and add missing ones to Identity - Advanced view

In the Identity -> Advanced... screen, some mnemonics are conflicting with others and some mnemonics are missing. Here is a summary what I propose to change, where:

• (mod) means, it is changed to letter in the first position (the original is what is underscored)
• (new) means, it was missing and added now
• <empty> means, no change.

General

O	Use custom gateway p_ort
R	Use custom _renegotiation interval
D (mod)	Data _compression
T	Use a _TCP connection
V (mod)	Set virtual _device type
N	 and _name
U	Use custom tunnel Maximum Transmission _Unit (MTU)
F	Use custom UDP _fragment size
S	Restrict tunnel TCP Maximum _Segment Size (MSS)
M	Rando_mize remote hosts
W (new) Allow Pull FQDN
P	_Prefix remote DNS name with random string
I (new)	IPv6 tun link
G	Specify pin_g interval
E	Specify _exit or restart ping
L	Accept authenticated packets from any address (F_loat)
X (new)	Specify max routes

Security

P	Ci_pher
S	Use custom _size of cipher key
H	_HMAC Authentication
F (new)	Verify CRL from file
D (new)	Verify CRL from directory
N	Disable cipher _negotiation

TLS Authentication

I (mod)	Server _Certificate Check
S	_Subject Match
U (mod)	_Verify peer (server) certificate usage signature
T (mod)	_Remote peer certificate TLS type
V	_Verify peer (server) certificate nsCertType designation
R	_Remote peer certificate nsCert designation
M (new)	Mode
F	Key _File
D	Key _Direction
E (new)	Extra Certificates
P (new)	TLS cipher string
N (mod)	TLS _min version
X	TLS ma_x version
O	_or highest

Proxies

T	Proxy _Type
E (mod)	Server _Address
P	_Port
R	_Retry indefinitely when errors occur
U	Proxy _Username
D	Proxy Passwor_d
S	_Show password

Misc

D (new)	Path mtu discovery
T (new)	Connect timeout
P (new)	Push peer info