Add Ctrl(+Shift)+Tab as alternative to switch between servers

Closes #512

src/main.js

@@ -8,7 +8,8 @@ const {
   nativeImage,
   dialog,
   systemPreferences,
-  session
+  session,
+  globalShortcut
 } = require('electron');
 const isDev = require('electron-is-dev');
 const installExtension = require('electron-devtools-installer');
@@ -342,6 +343,17 @@ app.on('ready', () => {
     console.log('The application has crashed.');
   });
 
+  // Add Alt+Cmd+(Right|Left) as alternative to switch between servers
+  if (process.platform === 'darwin') {
+    globalShortcut.register('Alt+Cmd+Right', () => {
+      mainWindow.webContents.send('select-next-tab');
+    });
+
+    globalShortcut.register('Alt+Cmd+Left', () => {
+      mainWindow.webContents.send('select-previous-tab');
+    });
+  }
+
   ipcMain.on('notified', () => {
     if (process.platform === 'win32' || process.platform === 'linux') {
       if (config.notifications.flashWindow === 2) {

src/main/menus/app.js

@@ -186,14 +186,14 @@ function createTemplate(mainWindow, config, isDev) {
       };
     }), separatorItem, {
       label: 'Select Next Server',
-      accelerator: (process.platform === 'darwin') ? 'Alt+Cmd+Right' : 'CmdOrCtrl+Tab',
+      accelerator: 'Ctrl+Tab',
       click() {
         mainWindow.webContents.send('select-next-tab');
       },
       enabled: (config.teams.length > 1)
     }, {
       label: 'Select Previous Server',
-      accelerator: (process.platform === 'darwin') ? 'Alt+Cmd+Left' : 'CmdOrCtrl+Shift+Tab',
+      accelerator: 'Ctrl+Shift+Tab',
       click() {
         mainWindow.webContents.send('select-previous-tab');
       },