Improve debugging for f_dialog_*_constrain() to print constrained rather
than unconstrained values.
Whitespace and comments.
Fix menu accenting for the package category list. The single-space indent
for duplicate initial-characters was removed for making comparisons but was
not put back.
Pad the PCPU MD struct, to satisfy an assert added with the projects/counters
branch import.

PR:		ports/179173,ports/179164
Fix a code typo (missing `eval') which lead to improperly-sized menu when
displaying packages (menu was always maximum height). The problem was
introduced by SVN r251232.