[FEATURE REQUEST] turn off preview feature when coping with MVALUE dialog.

[yerha]

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Describe the solution you'd like Hello, I very appreciate for you guys make such a good plugin, and it's helped me a lot. I add a Capture contaning {{MVALUE}} keyword, when I use this Capture to write somthing, it always have a text showing the content of input box and it's really slow. So I was hoping could you guys add a feature to choose whether this preview function display or hide.

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