Newly-selected icon arrangement is reverted if an additional app is added while still in icon arrangement mode

[jcstaudt]

App icon arrangement is reverted to the order it was in prior to entering "icon arrangement mode" if an additional app is added to the launcher while still in icon arrangement mode.

Current behavior:

• Long press an app to select it
• Press the button with three bars to enter icon arrangement mode
• Arrange the icons as desired
• Press the + button to add an app
• Select an app
• The app is appended to the list and the icon arrangement is reverted to the original order; icon arrangement mode is cancelled
  ...and so on

Expected behavior:

• Long press an app to select it
• Press the button with three bars to enter icon arrangement mode
• Arrange the icons as desired
• Press the + button to add an app
• Select an app
• The app is appended to the list and the list is still in icon arrangement mode with the order as it was prior to pressing +