fixed issue when checking if a sketch is temp

convert all windows drive letters to lower case. [ATL-380]

Signed-off-by: Akos Kitta <kittaakos@typefox.io>

arduino-ide-extension/src/common/utils.ts

@@ -3,3 +3,7 @@ export const naturalCompare: (left: string, right: string) => number = require('
 export function notEmpty(arg: string | undefined | null): arg is string {
     return !!arg;
 }
+
+export function firstToLowerCase(what: string): string {
+    return what.charAt(0).toLowerCase() + what.slice(1);
+}