- very large speed up of getting a list of packages

- fixed bug: programs could not be installed if the list of installed programs from epm play was empty
- implemented `epm play --product-alternatives` support
- added flag: `--latest' (appears if epm version >= 3.64.0)

fixed bug: programs could not be installed if the list of installed programs from epm play was empty.

- implemented downloading icons from Etersoft servers and caching

- when the user clicks on the row, the checkbox is activated
- errordialog implementation

- fix error: tput: unknown terminfo capability '2'
- added flags dialog and button
- added the ability to answer a question from the terminal (such as [Y/n])
- added the --auto flag and other minor improvements
- added reset button