I use an app called 'Phupp' and you upload your pictures onto that app, then copy the URL of the image and use it in the Tortoise Forum app. To use it, you press the '+' sign, and choose image link part to upload your image. It always works for me!
Look, I am not arguing. I am trying to figure out a separation plan.[hr]
This is exactly what I am doing as well, though I am not sure this is possible.