edit control: fix T9/SMS input for INPUT_TYPE_FILTER controls

This removes the special casing for T9/SMS input into edit controls of type INPUT_TYPE_FILTER (e.g. the "Filter" control in the side menu of the video files view) to interprete the input as numbers instead of T9/SMS input. I tried to figure out why the special casing was/is there but INPUT_TYPE_FILTER was added before T9/SMS support so maybe it was just a mistake when the latter was introduced.

@uNiversaI please let me know if this works for you.