* Use lowercase lang folder name for packages lang files
Use lowercase lang folder name for packages lang files to be consistent with Umbraco's casing
* Case insensitive `lang` folder lookup
* Comment grammar
* Setup lower case appl_plugin icons folder path
* Update Constants-SystemDirectories.cs
* Check both casings for the AppPluginIcons path
* Fixed spelling mistake + avoid multiple Exists checks
* Add IsCaseSensitiveFileSystem to IHostingEnvironment
* Add IsCaseSensitiveFileSystem to AspNetCoreHostingEnvironment
* Undo last changes
* Undo last changed
* Add FileSystemUtility
* Only perform second iconPath if OS is case sensitive
* Undo changes
* Undo changes
* Remove filesystem utils file
* Added HostingEnvironmentExtensions.cs
* Use IsCaseSensitiveFileSystem extension method
* Use the Umbraco.Extensions namespace
* Simplify IsCaseSensitiveFileSystem
* Better naming
* Use PluginIcons
* Remove unused using statement
* Delete HostingEnvironmentExtensions.cs
* Update IconService.cs
* Comment clarity
* Update src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.Services.cs
Co-authored-by: Paul Johnson <pmj+github@ologn.co.uk>
Co-authored-by: Paul Johnson <pmj+github@ologn.co.uk>
Co-authored-by: Michael Latouche <michael@crossingpaths.be>
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