Add some more encodings to the picker

fixes #16322
fixes #23646

src/vs/platform/files/common/files.ts

@@ -780,6 +780,16 @@ export const SUPPORTED_ENCODINGS: { [encoding: string]: { labelLong: string; lab
 		labelLong: 'Simplified Chinese (GB 2312)',
 		labelShort: 'GB 2312',
 		order: 45
+	},
+	cp865: {
+		labelLong: 'Nordic DOS (CP 865)',
+		labelShort: 'CP 865',
+		order: 46
+	},
+	cp850: {
+		labelLong: 'Western European DOS (CP 850)',
+		labelShort: 'CP 850',
+		order: 47
 	}
 };
 

src/vs/workbench/parts/files/browser/files.contribution.ts

@@ -204,7 +204,8 @@ configurationRegistry.registerConfiguration({
 			'enum': Object.keys(SUPPORTED_ENCODINGS),
 			'default': 'utf8',
 			'description': nls.localize('encoding', "The default character set encoding to use when reading and writing files."),
-			'scope': ConfigurationScope.RESOURCE
+			'scope': ConfigurationScope.RESOURCE,
+			'enumDescriptions': Object.keys(SUPPORTED_ENCODINGS).map(key => SUPPORTED_ENCODINGS[key].labelLong)
 		},
 		'files.autoGuessEncoding': {
 			'type': 'boolean',