Merge pull request #388 from kp52/clipper-1.2.x

Clipper 1.2.x
Fix #389 incorrect error message on initial display of login form
Fix #389 incorrect error message on initial display of login form (2)
Improve file/image set url for inputs that are not direct children of the form (i.e. in a colorbox)
<pre> wrapping
Fix and improve manager/includes/utf8.sanitise.php
Fix #383
Tweak main tools menu
Update version info for 1.2.5
Avoid error in TinyMCE if extraneous newlines are in the button/plugin config entries
Update changelog
Bugfix: Correct DocumentParser::rewriteUrls to not include base_url
Escape properties in install/instprocessor.php
Update changelog
Update version number/date for 1.2.6