Make the filter non-permanent

[LenKiMo]

Now, Harpy's time flow filter is permanently active once it's started. Let's say I enable filters when I'm browsing a user's Twitter, and the filter is enabled when I switch to someone else's Twitter list.

I recommend setting the default behaviour of the filter to "Enable only on current list" and "Always enable" as an optional option. After a user enables a filter on a user's Twitter list, the filter will automatically turn off when it exits the page. This is also true for the home timestream, where filters set by the user on the home timestream will not work on other users' tweet lists.