* Add share config button
* fill parameter now saves with curve tool
* rename _fill to _fill_inside for sync consistency (fill in pencil and shape tools basically represent the same thing)
* add icon
* Move the option to the preferences
* Add string to Translations.pot
* Re-introduce `is_syncing`
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Co-authored-by: Emmanouil Papadeas <35376950+OverloadedOrama@users.noreply.github.com>