Efficiency + Elegance Improvements

NEW CHANGES
- Extracted methods from actionPerformed
- Improved performance of SystemTest
- Increased timer delay slightly
- Opening current document from recent will now just reset values
- Removed tests that weren't testing anything
- PDFOutputCreatorTest now deletes all files on exit
- PDFOutputCreatorTest tests to ensure files were deleted on exit
- Closed filestreams in PDFOutputCreatorTest
- Refactored 'About' method for readability
- Removed stacktrace printing for exceptions that shouldn't happen
- Proofreading
- Depreciated focusListener
- Moved more variables to the top in UI
- Removed unused imports
- Empty logs now delete on exit