Linux: SteamVR overlay support (#1299)

* fix: open folder and select item on linux

* feat: linux wrist overlay

* feat: linux hmd overlay

* feat: replace unix sockets with shm on linux

* fix: reduce linux wrist overlay fps

* fix: hide electron offscreen windows

* fix: destroy electron offscreen windows when not in use

* fix: open folder and select item on linux

* feat: cpu, uptime and device monitoring on linux

* feat: native wayland gl context with x11 fallback on linux

* fix: use platform agnostic wording for common folders

* fix: crash dumps folder button on linux

* fix: enable missing VR notification options on linux

* fix: update cef, eslint config to include updated AppApiVr names

* merge: rebase linux VR changes to upstream

* Clean up

* Load custom file contents rather than path

Fixes loading custom file in debug mode

* fix: call SetVR on linux as well

* fix: AppApiVrElectron init, properly create and dispose of shm

* Handle avatar history error

* Lint

* Change overlay dispose logic

* macOS DOTNET_ROOT

* Remove moving dotnet bin

* Fix

* fix: init overlay on SteamVR restart

* Fix fetching empty instance, fix user dialog not fetching

* Trim direct access inputs

* Make icon higher res, because mac build would fail 😂

* macOS fixes

* will it build? that's the question

* fix: ensure offscreen windows are ready before vrinit

* will it build? that's the question

* will it build? that's the question

* meow

* one, more, time

* Fix crash and overlay ellipsis

* a

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Co-authored-by: Natsumi <cmcooper123@hotmail.com>

src-electron/patch-node-api-dotnet.js

@@ -31,11 +31,17 @@ managedHostPath = managedHostPath.indexOf('app.asar.unpacked') < 0 ?
 }
 
 // Paths to patch
-let platformName = 'linux';
+let platformName = '';
 switch (process.platform) {
     case 'win32':
         platformName = 'win';
         break;
+    case 'darwin':
+        platformName = 'mac';
+        break;
+    case 'linux':
+        platformName = 'linux';
+        break;
 }
 const postBuildPath = path.join(
     __dirname,