1c45331b0a
* Fix bug in early error reporting in main init * Update docstrings and optimise code in GuiMain * Update docstrings and optimise code in Config * Update docstrings and optimise code in common module * Update docstrings and optimise code in main project classes * Update the OptionState class * Update the spell checker class * Update the file converter classes and extend tests * Update the about, merge, split and item editor classes and extend tests * Update item editor test * Update about dialog tests * Some minor test cleanup * Fix typo and add clarification in contributing guide