* master: (22 commits)
Added grouping action
LayerData now works by using decorators
Do not cause "dictionary changed size during iteration" errors when changing view
Adds an idle-state for the layerview slider
Adds an idle-state for the safebutton
Sets the platform activity on true when a model is loaded
Sets the platform activity on true when a model is loaded
Create functions that get & set platform activity
Send M104 to set the temperature to 0
Do not store files that fail to load in recent files
feat: infill wipe dist; wireframe restructure & renaming; bugfix: draft_shield_height inherit_function
Also add the parent class' command line arguments
Only process the layer data if the layer view is active.
Write to the correct variable so bed temperature is properly updated
Correct a copy-paste error in getConnectionList
Properly close all open USB connections on shut down
Catch errors when trying to close the connection thread
Enlarge the zone where you can use scrolling to look trough the layer mode.
included retraction_extra_prime_amount
tiniest detail concerning the padding of the layer count label
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