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)
Updated processor instantiation
Add MODX-like support for separate 3rd party component setting topic to system settings processor.
[#5423] add media argument to the regClientCSS method
Add "success":true status to the getList processor to be used for MODx.Ajax listener
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
Clear menus cache
Use cacheManager->delete() as suggested by @Mark-H
Make use of the menu cache partition
Update _help.scss

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

Lossless image compression
Compress favicon

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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