Reset Warnings dialog: show translated warnings

Author:    Aurimas Fišeras <aurimas@members.fsf.org>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23588 57a11ea4-9604-0410-9ed3-97b8803252fd
Drop double blanks from gschema strings.

These resulted in message translations not being found:
gnc-warnings.c is generated from these strings using xsltproc
the *.po files are generated from these strings using gettext

gettext collapses whitespace. xlstproc doesn't at least not in the
way we use it. So when gnucash needs to look up a translation for
a warning, it won't find it due to the mismatch in message id.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23589 57a11ea4-9604-0410-9ed3-97b8803252fd