Analysis should be able to be saved and recovered at a later point

[jaschil2]

Requirements:
-The work done in the analysis should be able to be saved and loaded.
-The "Export State" and "Import State" function should be tested using every modification type and some combinations of modifications to ensure it works properly, saving and restoring the work properly.
-Deviations, if any, from what was saved and loaded should be noted.

Notes:
-"Export State" and "Import State" are used for this.
-As each modification has its own implementation of exporting/importing, they all need to be tested to make sure they work properly and synch with each other.

[kevindl2]

Export State is functional. The exported file is readable by the Import State function.

The Export Image function works now. The previous iteration of the function accessed the QFileDialog module from the QtGui package. The current iteration accesses the QFileDialog module from the QtWidgets package.

Josh told me he had trouble getting QtWidgets to work on some people's computers though.