Partially close a position specify amount in £

Close Partial Trade using an Amount in Pounds

I want a feature in cTrader where I can close the trade partially by specifying an amount in Pounds

For Example my Trade is -£9 negative the lot size 0.23, i want to close this negative trade by £3.50, I want to type in £3.50 in the close box and I want cTRader to reduce this trade to -£5.50 (9-3.50), it handles the Lot conversion behind the scenes.

I know I can close the trade currently using a lot size but i don't want this, I want to close by percentage and close by Amount in £ and cTrader does the conversion in Lot behind the scenes.

Also Time is important, I need this functionality at row level against each trade, so quickly partially close the position for that row, rather opening the ticket then typing lot and then saving.