feat(xref): docked External References panel with previews and translations

Docked External References panel with host row, thumbnail previews, and translated interface strings.

src/app/commands/mod.rs

@@ -612,6 +612,7 @@ inventory::submit!(crate::command::CommandRegistration {
         "EXPORT",
         "EXPORTSTEP",
         "EXPORTSTL",
+        "EXTERNALREFERENCES",
         "EXTRIM",
         "FILETAB",
         "FIND",
@@ -714,7 +715,6 @@ inventory::submit!(crate::command::CommandRegistration {
         "XR",
         "XREF",
         "-XREF",
-        "XREFMAN",
         "XRELOAD",
         "ZOOM",
         "ZS",