Build the rest of the view here. Added a listbox with scrollbar and reformatted all widgets to look nice. Tried to add functionality, failed. Added a todo in the code there.

PEP8 changes and changes of things that were simply wrong. IDE still complains about a few things but they are not worth the time they require to be fixed.

Continue working on this with also Thomas' changes

See merge request !124

Created a few buttons, no functionality & added a few labels to the review menu plus combox for file selection.

Added __repr__ to ShadowTask, which can be used later to make the drop down list in the Review Window.

Moved a method from abstractclass to the implementing class, because it is specific for the CSV output.

Changed 'assignment' to 'condition' in the result dataframes, because this reflects the meaning of that column better.

Changed variable name 'task' to 'condition' because this explains its meaning better. Also added white lines somewhere for PEP8.

Sc204/alg in output

See merge request !115

Output files contain now an indication of the date and time in their name, making them unique, assuming no files are saved at the same second.

Added functionality that stores the last used algorithm, so that this can be recalled even though the user changes the algorithm after running a comparison.

Added str to AlignmentStrategies and subclasses so that those objects can be used to get a string to add to the filenames or anywhere else.

Created a more general function for the _center_view and implemented the changes in the view and splash.