custom sense menu implementation

[odanoburu]

we're currently using hydra, which is not really made for dynamic menus, and is hence a hack. it's not very maintainable, specially with the new features we wish to provide, and doesn't handle large number of senses well (see #136).

related to #155, #136, #129

• show if a sense is a satellite or not

this solution could be a general solution for the provision of dynamic menus in elisp; we could use it to pick lemmas in this tool too.