Do not show warnings that we cannot fix without breaking the VS 2012 build.

src/Renci.SshNet.VS2015.sln.DotSettings

@@ -1,2 +1,6 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
-	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=UnusedParameter_002ELocal/@EntryIndexedValue">WARNING</s:String></wpf:ResourceDictionary>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=AutoPropertyCanBeMadeGetOnly_002ELocal/@EntryIndexedValue">DO_NOT_SHOW</s:String>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=ConvertIfStatementToConditionalTernaryExpression/@EntryIndexedValue">DO_NOT_SHOW</s:String>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=ConvertPropertyToExpressionBody/@EntryIndexedValue">DO_NOT_SHOW</s:String>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=UnusedParameter_002ELocal/@EntryIndexedValue">WARNING</s:String>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=UseNullPropagation/@EntryIndexedValue">DO_NOT_SHOW</s:String></wpf:ResourceDictionary>