v 0.8.5

Bugfix #274: Trying to solve "Element with id is already registered" error.

Enhancement #277: Adding new command to open a file and focus the document using ctrl+enter keybinding.

Enhancement #289: Add context option to Open in Solution Explorer

Enhancement #295: Syntax coloring for .sln files

Renaming the extension terminal from "dotnet" to "solution-explorer" to avoid conflicts with other extensions.