Settings screen

[jariz]

Considering there are a lot of feature requests regarding settings, it's probably best to add a settings screen as well while implementing these.
This would contain:

• Add option to change notification sound #19 Notification sound setting
• Add 'Launch on system startup' menu item  #10 Start with system option
• Option to omit app name #26 Omit app name setting
• PushBullet password could also be moved into here with a bit of a better UI that clearly indicates whether it's enabled or not (it's kinda vague right now)
• Thumbnail rounding on/off

[mirshko]

@jariz Here is my take at the updated settings panel with all the settings marked above!

[mirshko]

Here is the updated panel with the icons.

@jariz Here is the sketch file in case you need it: Noti System Settings.zip

[jariz]

0.2 is released.