[Translations] Give translators context for separator-bearing tr() strings (#6487)

Build the card menu's related card actions from complete strings with %1
placeholders instead of appending translated fragments. This also fixes
tr(cond ? "Transform into " : "Attach to "), which lupdate cannot extract:
neither string appears in cockatrice_en@source.ts, so neither was ever
translated.

Give the EDHRec tab title a %1 placeholder so French can render
"EDHRec : %1" instead of concatenating into "EDHRec :CardName".

Keep the colon in tr("Token:") and the leading space in tr(" seconds"),
since that separator is language-specific, and attach //: translator
comments so they are no longer shown out of context on Transifex.

cockatrice/src/interface/widgets/dialogs/dlg_forgot_password_reset.cpp

@@ -56,6 +56,7 @@ DlgForgotPasswordReset::DlgForgotPasswordReset(QWidget *parent) : QDialog(parent
     playernameEdit->setMaxLength(MAX_NAME_LENGTH);
     playernameLabel->setBuddy(playernameEdit);
 
+    //: Code mailed to the player so they can reset their password. Not a game token.
     tokenLabel = new QLabel(tr("Token:"));
     tokenEdit = new QLineEdit();
     tokenEdit->setMaxLength(MAX_NAME_LENGTH);