Please add ability to filter keys in the Key Mapping

At first, thank you for the SharpKeys ! I am using SharpKeys 3.9.2 and wondering how could it be that there is no filtering in the Key Mapping dialog? With the list-boxes containing 200+ items it would be brilliant to be able to filter the items in these boxes by typing partial name of a desired key. I'm thinking about a "filter" edit-box right above each list-box in the Key Mappings dialog. Once anything is being typed in one of these "filter"edit-box, the corresponding list-box will immediately reflect that by keeping only those keys that contain the typed text in the names of the keys. Note: Handling Ctrl+Backspace may require an explicit handler (method) that will delete the last word prior to the caret, because Windows' edit-box is known for inserting a stupid unreadable symbol as the result of pressing Ctrl+Backspace rather than deleting the word prior to the caret. What do you think?