Bug 1093951 - Entering wifi power save mode when screen off. r=alive

While screen is off, wifi would go to power save mode only
when wifi lock is held. If wifi lock is not held, wifi would
stay on and be turned off after |wifi.screen_off_timeout|.
We can more aggressively request the wifi driver to enter
power save mode before timed out. This is what the patch
intends to do.
Bug 1083528 - Add dev/stage Marketplaces to 2.0
Merge pull request #26125 from nullaus/bug1077595

Bug1077595
(cherry picked from commit 906123b6d71bcd9d8db77227ffba7269e6cbaeb9)

Conflicts:
	apps/system/js/statusbar.js
Merge pull request #26310 from nullaus/v2.0

Merge pull request #26125 from nullaus/bug1077595
Merge pull request #26091 from elefant/dev/bug1093951-wifi-powersave

Bug 1093951 - Entering wifi power save mode when screen off. a=bajaj
Merge pull request #26129 from crh0716/1098684

Bug 1098684 - Hide the AP PIN item r=eragonj
Merge pull request #26206 from clouserw/1083528.2

Bug 1083528 - Add dev/stage Marketplaces to 2.0  r=fabrice
Merge branch 'v2.0' into v2.0m.