Notifications pre-release

Since I don't have enough time nor stuff to print to test the notifications properly I hope some people help and test the new feature.
Also I there is a lot of small things I added since the last version but never felt like it was worth publishing.

• Added Notifications
• Added Settings (#15 confirm EMS, always show baby stepping)
• Added sorting for Files-View
• Added Files-View updating on changes trough another machine
• Added Klipper-Error message showing
• Added Printer control settings (Invert axis, move speed, extrude rate...)
• Fixed current layer info
• Fixed URL launching
• Fixed visibility of heater card's text
• Fixed color swatch