It looks like we need a bit of mop-up for a recent UI standardization upgrade to the preferences pages. Specifically, the "days to show" and "number of changes to show" boxes at the top of the RC and Watchlist prefs pages have a couple of issues:
 The boxes are too wide with `697px` (`50em`). They should never have to hold more than 7 (example 1 hour of a day `0.04167`, because of fractional days, see below) and 4 digits, respectively. We should:
 Shorten these elements so that they don't confuse users about the type of input that is being requested, AND/OR
 Use some type of number widget that would be even more suitable, and might handle the maximum allowable limits more gracefully (as compared to letting users Save and only then informing them that the number they entered is not allowable).
 The "days to show" box has been set to accept 1 as the minimum number. This is not the way the code is written. E.g., users who want to set their defaults to 1 hour should be able to enter 0.04167 days. ( I know that we did have this capability. If we want to change that, we can talk about it. But I am guessing this change was just an assumption on the part of whoever did the upgrade.)
[x] Fix the help text for "Number of edits to show" on the RC prefs page: I think it's supposed to be the same as the help text on the similar, WL prefs elements: "Maximum number: 1000."