Fixed 0002949: News title and body should be mandatory

M news_add.php
M news_update.php

• Improved the layout of the operation successfull message.

M news_edit_page.php
M news_menu_page.php

• Highlighted the required fields (title / body)

M core/news_api.php

• news_create(): Verify that both title and body are not empty.
• news_update(): Verify that both title and body are not empty.

M doc/ChangeLog

• Updated.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1947 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9