Gitignore update

Author: jonahandersson

.gitignore

@@ -349,7 +349,7 @@ MigrationBackup/
 # Ionide (cross platform F# VS Code tools) working folder
 .ionide/
 
-*/properities/
+properties/
 
 # Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
@@ -364,4 +364,5 @@ MigrationBackup/
 *.sln.docstates
 
 # User-specific files (MonoDevelop/Xamarin Studio)
-*.userprefs
+*.userprefs
+*.sln