Provide keyboard shortcut to switch between servers.

app/renderer/js/components/server-tab.js

@@ -1,12 +1,16 @@
 'use strict';
 
 const Tab = require(__dirname + '/../components/tab.js');
+const SystemUtil = require(__dirname + '/../utils/system-util.js');
+
+const {ipcRenderer} = require('electron');
 
 class ServerTab extends Tab {
 	template() {
 		return `<div class="tab">
 					<div class="server-tab-badge"></div>
 					<div class="server-tab" style="background-image: url(${this.props.icon});"></div>
+					<div class="server-tab-shortcut">${this.generateShortcutText()}</div>
 				</div>`;
 	}
 
@@ -26,6 +30,27 @@ class ServerTab extends Tab {
 			this.$badge.classList.remove('active');
 		}
 	}
+
+	generateShortcutText() {
+		// Only provide shortcuts for server [0..10]
+		if (this.props.index >= 10) {
+			return '';
+		}
+
+		const shownIndex = this.props.index + 1;
+
+		let cmdKey = '';
+
+		if (SystemUtil.getOS() === 'Mac') {
+			cmdKey = '⌘';
+		} else {
+			cmdKey = '⌃';
+		}
+
+		ipcRenderer.send('register-server-tab-shortcut', shownIndex);
+
+		return `${cmdKey} ${shownIndex}`;
+	}
 }
 
 module.exports = ServerTab;