BUGFIX: Fix terminal auto complete not properly handling folder casing

[CaseZumbrum]

closes #1708

Removed the conversion of paths to lowercase for the terminal auto completion. Previously, this would allow similarly named folders (scripts vs. Scripts) to share tab auto completion options.

Image showing improper casing, the "Scripts" folder does not exist but the terminal suggests files within the similar "scripts" folder.

Image showing proper casing, the "Scripts" folder does not exist, and no recommendations are given.

Tested with nested folders and ensured that auto completion still occurs on partial folder names (ex: typing "Scr" + TAB will autocomplete to "scripts")

[d0sboots]

The failing test indicates you broke some stuff. Code inspection also indicates (to me) that you broke cases like tab-completing Script/foo when Script is a directory that exists; I think you didn't test this well enough.

[d0sboots]

Let me level with you: I don't think this is a good first bug to tackle. It is one of those that looks like a small thing on the surface, but secretly it is an entire iceberg of complexity underneath.
I'm not sure what a correct fix to this bug would look like, but I know that I'd probably have to spend at least an hour working through the cases to figure it out. (And a similar amount of time to verify a potential fix.)