Qt/MenuBar: Make failures to load map and signature files more obvious

Previously we wouldn't indicate if saving or loading these files
happened to fail. In some cases we'd only print out to the logger, but
this is a pretty poor way to tell a user of the interface that something
went wrong in a direct way (the logging messages aren't able to be localized
either).

0 files changed, 0 insertions, 0 deletions