Make Path completion/suggestions for Sitecore paths case insensitive.

[AdamNaj]

Expected Behavior

Path completions should be case insensitive.

Actual Behavior

Path completions behave in a weird way before version 8.0. Being case sensitive if part of the name is provided that does not match the casing of the item. This is super annoying.

Steps to Reproduce the Problem

1. Open ISE
2. Type Get-Item master:\ and press Ctrl+Space. SPE will provide suggestions for all root children items of the master database including /templates
3. Type Get-Item master:\te and press Ctrl+Space. SPE will provide suggestion for /templates
4. Type Get-Item master:\Te and press Ctrl+Space. SPE will not provide any suggestions as the initial checking in Sitecore is case-sensitive.

[AdamNaj]

Implemented