Merge branch 'hotfix/5.4_fix_1'
Convert to AvalonEditor to make SQM browsing easier
More robust error handling
Support scientific notation in array items
Bump README version to 5.4 fix 2
Fix handling of missing tokens
Merge branch 'feature/5.4_fix_2' into hotfix/5.4_fix_2
Merge branch 'hotfix/5.4_fix_2' into develop