[7.7]Fix 668301: [Feedback] Unable to change font colors for vb.net by Vis…

[Therzok]

…ual Studio Community 2017 for Mac

Fixes VSTS #722812 - No syntax highlighting for .vb files

[slluis]

@monojenkins backport master

[monojenkins]

@slluis backporting to master failed, the patch results in conflicts:

Applying: Fix 668301: [Feedback] Unable to change font colors for vb.net by Visual Studio Community 2017 for Mac
Using index info to reconstruct a base tree...
M	main/msbuild/ReferencesRoslyn.props
M	main/src/addins/VBNetBinding/VBNetBinding.addin.xml
M	main/src/core/MonoDevelop.Ide/ExtensionModel/MonoDevelop.Ide.addin.xml
Falling back to patching base and 3-way merge...
Auto-merging main/msbuild/ReferencesRoslyn.props
CONFLICT (content): Merge conflict in main/msbuild/ReferencesRoslyn.props
error: Failed to merge in the changes.
Patch failed at 0001 Fix 668301: [Feedback] Unable to change font colors for vb.net by Visual Studio Community 2017 for Mac

Please backport manually!

[slluis]

Nevermind, tried to backport the wrong PR.

[slluis]

Syntax highlighting now works, but the editor shows an error underline for the whole text. This does not happen on 7.6.11.