Handle installation console keyboard shortcut

[lslezak]

• Handle a special keyboard shortcut for starting the installation console (jsc#PM-1895, jsc#SLE-16263)
• The implementation is similar to handling the debugging keyboard shortcut
• Related to libyui/libyui#179
• Also fixed build error in Leap 15.2/15.3:
  • Builtin.cc:228:17: error: 'CRYPT_GENSALT_OUTPUT_SIZE' was not declared in this scope
  • Fixed by using the crypt_gensalt_ra() function which does not need a static buffer, but it allocates the memory for the result itself (see man crypt_gensalt_ra)
  • Should be also faster as it avoids copying the content of the static buffer

Testing

Tested manually with the repositories client (uses the UI::WaitForEvent() call) and the host client (uses the UI::UserInput() call). Works fine in both cases.

[yast-bot]

:heavy_check_mark: Public Jenkins job #43 successfully finished :heavy_check_mark: Created OBS submit request #872744

[yast-bot]

:x: Internal Jenkins job #35 failed