Fix minor EBN issues and modernize some references
Summary:
The list of the issues:
http://ebn.kde.org/krazy/reports/kde-4.x/kdewebdev/kimagemapeditor/index.html
Test Plan: Compiles and runs.
Reviewers: KDE Applications, aacid
Reviewed By: KDE Applications, aacid
Differential Revision: https://phabricator.kde.org/D25353