Now We're Stylin'

• Added Spanish translation.
• Added support for Control-Return/Tab to support adding newlines/tabs in a node's title.
• Improved node title editing support for selection and cursor movement.
• Added support for automatically opening Minder files from Files.
• Added ability to modify styles of nodes and links.
• Changed layouts to be stored on a per tree basis instead of a per document basis.
• Added support for exporting to the Mermaid format.
• Added support for disabling/enabling displaying markup in node title.
• Improved the look of the fold indicators.
• Lots of bug fixes.