Config: pick the default quality profile and root folder from the server

The two defaults of Radarr and Sonarr are dropdowns filled from the
server with the address and key in the fields: when the view opens, on
Revert, and shortly after either is changed. A configured value the
server does not list stays selectable, marked "(not on the server)".

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019reK4DUGYqDUjniWYJvwUW

internal/ui/help.go

@@ -70,6 +70,7 @@ var helpSections = []helpSection{
 		{"↑↓", "move through all fields, one below the other, in the sections Radarr, Sonarr, SABnzbd and Interface; ↓ after the last field reaches Save and Revert"},
 		{"Tab", "jump between the fields and Save / Revert"},
 		{"Space", "toggle a checkbox; press a button"},
+		{"←→, Enter", "the default quality profile and root folder: pick from the lists the server has (loaded with the address and key in the fields)"},
 		{"Test", "(button below the SABnzbd settings) checks the three services with the values typed in"},
 		{"Save, Revert", "(at the bottom) Save writes the file and applies everything at once; Revert discards edits"},
 	}},