feat: add option to preserve logs in the output window (#20)

Closes #18

chore: up version number

fix: warning couldn't open output window after window opened (#15)

Switch from 
un() to show() to open the output window as the event loop is already running.

Closes #15

refactor: improve script card ui

The buttons' icons are now hidden when clicking on the card.
The script's name is correctly centered.