* Make it possible to disable a module for a renderer
* Put DesktopCapturer API under a build flag
The name is "enable_desktop_capturer".
Enabled by default.
- introduce a currentPlatformSupportsAppIndicator() function determining
if app indicators are supported here.
- handle undefined process.env.XDG_CURRENT_DESKTOP
- added some comments to ensure that the intents are clear
Thanks MarshallOfSound
Multiple sessions inherits the "ubuntu" base settings properties in ubuntu.
One of the most popular one is communitheme: the next ubuntu default theme
has its dedicated session, with thus duplicated indicators for dropbox.
Rather than a string comparison for ubuntu, only match a substring then.
XDG_CURRENT_DESKTOP can be of form: "communitheme:ubuntu:GNOME",
"ubuntu:GNOME", …
Fixes: #12843.
Ubuntu is switching to Gnome in 17.10 but it's not going to be the stock Gnome session. It's going to support the existing Unity APIs. Support has already landed for application indicators and likely other APIs (Launcher,etc) will be supported soon. The Ubuntu Gnome session will have `XDG_CURRENT_DESKTOP=ubuntu:GNOME` environment variable.
Ref: https://didrocks.fr/2017/08/23/ubuntu-gnome-shell-in-artful-day-7/
