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