[Settings]: recents panel clear all button tweaks

- Show or hide recents button
- Place the button in top right or left

@cristianomatos
Settings: Navigation bar options (2/2)

-Toggle on/off
-Height and width
Settings - Wifi notifications: notify when wifi connects [2/2]

Options:
off (default)
a dry white toast
a notification
a notification with a sound

For those of us that survive on wifi islands in small college towns this
is
pretty nice to have

Any notification within 30 seconds of broadcast intent
ACTION_BOOT_COMPLETED
will be canceled to prevent startup notification spamming. 8 (default)
of the
previous connections are remembered and it will update the
notification's content
accordingly if you've restored a connection.

PS2: clean up strings
PS3: fix build & fix list preference not being updated

Change-Id: I18448773c64a6a0d65e7c39d008de2b371f4d556
Signed-off-by: STELIX <ssspinni@gmail.com>