Make Organize Imports refactoring NOT save automatically after edit.

Since Organize Imports is not at the moment 100% bug-free, it seems the right default to make it leave edited files in a dirty state.
Fixes #1001573 .
Fix character encoding issue in about.ini

This file is interpreted only with ISO 8859-1, which leads to
problems in non Windows environments. Special characters have
to be encoded by Unicode escapes.
Merge pull request #653 from huitseeker/issue/1001573

Make Organize Imports NOT save automatically after edit.
Merge pull request #654 from sschaef/t-about-character-encoding

Fix character encoding issue in about.ini
Touches up the descriptions of the plugins.

Along with bfc88fd0, Fixes #1001605.
Merge pull request #656 from huitseeker/issue/1001605

Touches up the feature.xml descriptions of the plugins.