fix desktop_capture_monitor style

[Screen Selection]

add application name to the UI,
cancelChooseDesktopMedia implementation

Merge pull request nwjs#3352 from Powder/patch-1

Correct Mac OS X example app name

bump version to 0.12.0

[README] update for 0.11.5

[README] update for 0.11.4

[README] update for 0.11.3

nw12: rebase fix for mac

[README] update for 0.11.2

[README] update for 0.11.1