audio/mixertui: Update to 1.0

CHANGELOG:

• fix: UI bugs (bar background and select device)
• add: KEY_HOME to set volume to 100 %
• add: libsysctlmibinfo2 dep, so in the port Makefile: add LIB_DEPENDS= libsysctlmibinfo2.so:devel/libsysctlmibinfo2

PR: 245569
Submitted by: Alfonso S. Siciliano <alfix86@gmail.com> (maintainer)