Create test cases for new features

[tobi18991]

Extend the already existing test suite to also test for new features included in the plugin.

The following list enumerates all features that are untested right now. Please check them when test cases exist for them. Also link the corresponding issue if one exists.

• Attributes should be in same order as in "Default Attributes" Dialog #14
• Allow re-ordering of attributes #15
• Improve default assignment of functions to different node types #19
• Allow for non-integer edgeWeights #43
• Add "Set attackgraph shape" context menu option #45
• Remove default attributes from white attack step template #55
• Highlight critical paths #57
• Highlight incoming and outgoing edges of selected node #58
• Show status of background workers #80
• Allow setting the computed atttributes buble color by functions #82
• Visualize Impact reduction #104
• Automatic check for newer plugin versions #122
• Include option to separate functions from .drawio file #132
• AND and OR nodes are labeled

Please never close this issue to allow tracking of untested functionality!