Implement password management

[scottmc]

This got a 35% must-have vote, and a 61% only-if-ready vote, so not an R1 requirement, but still a nice enhancement to have if it's ready in time.

Prop #21e Implement password management

Developer results

• must-have (axeld, mmlr, yourpalal, zooey, ithamar, laplace, bonefish, Wim, sikosis, brecht)
• only-if-ready (nielx, pulkomandy, umccullough, czeidler, jprostko, jonas.kirilla, scottmc, anevilyak, 3dEyes, stippi, leavengood, mmadia, colin, korli, tqh, phoudoin, humdinger)

General poll results

[scottmc]

Is this one complete now with "keystore" or is there more to be done?

[pulkomandy]

(In #7660) Yes, there are a few problems left:

• Can't join network with special chars (space or so) in the SSID or key
• Network connection is unreliable and will drop after some time, without any notice.
• wpa_supplicant can be crashed easily, and isn't restarted
• if you enter the wrong key and fail connecting to a network, you have to reboot and start over

[pulkomandy]

No, this one is for a website password manager in Web+, which we still don't have.

[axeld]

Why add a separate password manager in Web+, and not use the one provided by the system?

[pulkomandy]

Of course this should use the system-wide stuff to manage the passwords. It still has to be plugged into WebKit, to detect password fields in webpages and allow filling them.