Add all available placeholders to MRT dialog

[Lefteous]

Unfortuantely users need to open the help in order to see a list of all placeholders.

What about adding the to the dialog. There might be many ways to achieve this. Here are some ideas which would cost no extra space.

- A so called split button on the name button. This means there is main button part on the left side (unchanged). On the right part of the button there is another button with an arrow just like in a dropdown. Clicking on it reveals a dropdown menu with all the other placeholders.
- Integrate the other placeholder in the plugins menu (or whatever it is in TC 9).

[ghisler(Author)]

Yes, this would be very nice to have, and your space saving suggestions sound very good.

[Dalai]

Support++

Regards
Dalai

[Dalai]

Thanks for adding this one! There's a small inconsistency though: Pressing the new [+] button shows the menu below this button, while by pressing the new [#] button the button is covered by the menu.

Regards
Dalai