Support Insert/Replace mode for "Rename" (F2) function

[tommy.huang]

It is more convenient to support "Replace" mode while renaming the filenames.

For example, if I want to rename a file with name "abc_def.txt" to "Abc Def.txt", with current version, I need to delete "a/_/d" then add "A/ /D". If "Replace" mode is supported, I only need to press "Insert", then "A/ /D".

The mode is returned to "Insert" after the operation is done.

Thanks.

[joby_toss]

Ctrl+M (works on single file, too)