New keyboard shortcut for new Group chat

[rushatgabhane]

cc @Beamanator

Details

OS specific shortcut using libs/getOperatingSystem
To open new group chat.
Command + shift + K for MacOS
Control + shift + K for Windows/Linux.

To not allow extra key modifiers being pressed

const extraModifiers = _.difference(['shift', 'control', 'alt', 'meta'], callback.modifiers);
And then return early if they're being pressed.

Subscribe K to open new group chat.

On subscribing the key K

KeyboardShortcut.subscribe('K', () => {
    Navigation.navigate(ROUTES.NEW_GROUP);
}, ['control', 'shift'], true);

Contains of eventCallbacks are shown below. Which is why I loop over it.

I also changed shortcut for search on Windows,
from Win + K to Control + K as per the discussion on Slack.

Fixed Issues

$ #3349

Tests / QA

1. Login
2. • On Windows/ Linux, press Cltr + Shift + K to give focus to new group chat.
   • On MacOS, press Command + Shift + K to give focus to new group chat.

Tested On

Don't have a Mac to test Desktop app.

• Web Windows
• Web MacOS
• Desktop

Not applicable (Mobile Web, iOS, Android)

Screenshots

Web

Screencast.from.25-06-21.03_00_46.PM.+03.mp4

Desktop

Don't have a mac :)

[OSBotify]

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

[OSBotify]

🚀 Deployed to staging in version: 1.0.74-1🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅