DIALOG_ENV_VAR_CONFIG: allows using lowercase chars when typing an env var name. these lowercase chars are converted to uppercase on the fly.

Previously, lowercase chars were not accepted, and nothing was displayed when trying to type a name in lowercase chars.

common/validators.cpp

@@ -80,6 +80,6 @@ FILE_NAME_WITH_PATH_CHAR_VALIDATOR::FILE_NAME_WITH_PATH_CHAR_VALIDATOR( wxString
 ENVIRONMENT_VARIABLE_CHAR_VALIDATOR::ENVIRONMENT_VARIABLE_CHAR_VALIDATOR( wxString* aValue ) :
     wxTextValidator( wxFILTER_INCLUDE_CHAR_LIST | wxFILTER_EMPTY, aValue )
 {
-    wxString includeChars( wxT( "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_" ) );
+    wxString includeChars( wxT( "abcdefghijklmnopqrstuvwxyABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_" ) );
     SetCharIncludes( includeChars );
 }