Clear modX::user on init context

Possible fix for http://bugs.modx.com/issues/10221
fix boolean and numeric values for rendering

empty($params['key']) does not work for string "false"
Allow filtering of namespace by request on lexicon page

Like https://github.com/modxcms/revolution/commit/58ed1e52057ba71d020ffc4019778860958395e0 this enables users to filter on namespaces by request on the lexicon grid

Something like http://domain.com/manager/index.php?a=71&namespace=babel

This is useful since you can share a link to a specific lexicon e.g. from the dashboard, so clients can easily find it.
Extending #458 'open in new window' feature with optional Shift modifier. Shift + click in resource tree to edit in new window for users with no middle mouse button (e.g. Apple magic mouse, trackpads, etc)
Add MODX-like support for separate 3rd party component setting topic to system settings processor.
Reg exp bug
Add margin to input fields

In Firefox, the input fields don't have margins.
[ReUp] Add fallback http_host to prevent cache issues under certain HTTP/1.0 scenarios
updated phpmailer class to 5.2.7
change query param to &ns
Update _help.scss

Adjusting width to account for 1% padding to each box, so 4 boxes are displayed in one row.
Compress images in setup\assets

Lossless image compression
Compress favicon

Lossless image compression
Compress images in manager\templates\default\

Lossless image compression
Compress images in manager\assets\ext3

Lossless image compression
Compress images in _build

Lossless image compression
Compress images in setup\assets

Lossless image compression
Added ability to define "welcome" action & namespace
Better be handled at the controller level (modManagerRequest)
Stick with class parameters...