Add language string

Add `Copy (@sel.count) items selected` to `en.nss`, and add the missing `windows` in `en.nss`

Author: XY0797

src/bin/imports/file-manage.nss

@@ -2,7 +2,7 @@
 {
 	menu(separator="after" title=title.copy_path image=icon.copy_path)
 	{
-		item(where=sel.count > 1 title='Copy (@sel.count) items selected' cmd=command.copy(sel(false, "\n")))
+		item(where=sel.count > 1 title=loc.copy_multiple_paths cmd=command.copy(sel(false, "\n")))
 		item(mode="single" title=@sel.path tip=sel.path cmd=command.copy(sel.path))
 		item(mode="single" type='file' separator="before" where=length(sel.lnk)>0 title=sel.lnk cmd=command.copy(sel.lnk))
 		separator

src/bin/imports/lang/en.nss

@@ -14,6 +14,7 @@ windows_notepad="Windows notepad"
 
 // file-manage.nss
 file_manage="File manage"
+copy_multiple_paths='Copy (@sel.count) items selected'
 all="All"
 invert="Invert"
 none="None"
@@ -73,6 +74,7 @@ apps="Apps"
 paint="Paint"
 edge="Edge"
 calculator="Calculator"
+windows="windows"
 cascade_windows="Cascade windows"
 Show_windows_stacked="Show windows stacked"
 Show_windows_side_by_side="Show windows side by side"