Within the settings of the Risk and Reward tool, a single data box could be added to type in a % amount to close as the trade is live. In my opinion simplicity is key for this tool so one 'P-Close' button is all that is required - once this button is clicked, the bot will automatically close the % of the trade input into the bot settings.
A ''Stop to break even' button isn't required as this can be done manually with ease once you have closed 'X%' of the trade. Dragging a stop loss to break even on screen is not a hardship, it takes two seconds - however, messing around with a partial close mid trade whilst scalping on the five minute chart can see mistakes made and profits lost.
Adding a number of new buttons on the front end of the tool will add confusion and take up more chart. A single 'Partial Close' button is all that is need, this button linked to a single data cell within the bot settings.
A single button to partially close a trade is all this tool/bot needs to be perfect.