deskutils/freeplane: Update to 1.7.10

Changelog:

• Fix menu mnemonics
• Do not output links twice when copying nodes to clipboard
• Allow to change positions of LINE shape connectors
• New action: Select nodes matching filter
• Dark UI mode support (Look and feel and map template "Darcula")
• Overwrite system properties from installation specific file <install-dir>/system.properties
• Environment var FREEPLANE_JAVA_OPTION_FILE can override path to system.properties read on start
• Add new properties to connector API : dashArray, opacity, width, labelFontFamily and labelFontSize
• Suggest to delete all user configuration and resource files on uninstall

PR: 241522
Submitted by: Loïc Bartoletti <lbartoletti@tuxfamily.org> (maintainer)
MFH: 2019Q4