v0.9.3

this release changes:

• improvement: add button to export notification to open file location in file-manager after exporting (thanks to @silvasch)
• improvement: initial export file picker folder got improved, now prioritising the rnote file location and are now remembered between exports (thanks to @pobrn )
• improvement: more readable file row names
• improvement: add keyboard shortcut for snap-positions action
• improvement: pdf import option to toggle page borders
• fix: don't export empty pages that are adjacent to content that is snapped to the document grid
• fix: progress pulses getting out of sync when executing multiple operations in parallel
• fix: typewriter width adjustment button disappearing after setting it to minimal width