* Creating a FileProviderFactory for getting the package.manifest and grid.editors.config.js files through a file provider
* Collecting the package.manifest-s from different sources
* Searching different sources for grid.editors.config.js
* Using an IFileProvider to collect all tours
* Refactoring IconService.cs
* Typo
* Optimizations when looping through the file system
* Moving WebRootFileProviderFactory to Umbraco.Web.Common proj
* Removes double registering
* pluginLangFileSources includes the localPluginFileSources
* Comments
* Remove linq from foreach
* Change workflow for grid.editors.config.js so we check first physical file, then RCL, then Embedded
* Clean up
* Check if config dir exists
* Discover nested package.manifest files
* Fix IFileInfo.PhysicalPath check
* Revert 712810e1fd995720047832ee689f804185ea69d6 as that way files in content root are preferred over those in web root
* Adding comments
* Refactoring
* Remove PhysicalPath check
* Fix registration of WebRootFileProviderFactory
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