Pylustrator

A big update for pylustrator with increase performance on large figures and extended tests with better undo/redo functionality.

- increased performance when editing large figures due to not drawing the selection in the figure but in Qt
- deactivate broken exception silencer
- compatibility with matplotlib >= 3.6.0
- icons for legend editor
- automatic tests for axes and texts
- better undo/redo functionality
- allow to set tuples for linestyles

Fixes version compatibility with matplotib < 3.4.0 that was introduced when pylustrator implemented basic support for SubFigures.

Changes to the interface
- slight redesign of left panel to make button labels readable
- left panel can be resized
- changed icon of y-tick editor
- moved position and size spin boxes to top row
- added undo/redo buttons and extended undo redo functionality
- modernized style of canvas background and fixed ruler number display

Changes to the generated code
- generated code for added text is now only one line instead of one line for each property
- generated code for despining is not one line instead of two

Bug Fixes
- remove erroneous tick warnings
- figure is resized to fit into the default window size
- fixed compatibility with recent jupyter notebook versions
- basic support for figures with subfigures

- allow use in shell (just prints the results without storing them)
- updated pipy description.

fixed pylustrator to work with the current matplotlib version.

Changes:
- added function to arrange plots to a regular grid
- smaller bugfixes