fixed the cursor index when filtering list

[menosbits]

In src/components/list.zig, the function updateFilter() sets the List's cursor field to "self.filtered_indices.items.len - 1" — i.e., to the last filtered item — when the cursor field is greater than or equal to filtered_indices.items.len and that length is greater than zero.

This behavior is confusing because it makes it appear as if there is only one filtered item, while there are other items above. You can see the behavior in this video:

Before.changes.mp4

In my view, the correct behavior is to reset the cursor to the first item when the list is filtered. Accordingly, the code has been changed to the following:

--- a/src/components/list.zig
+++ b/src/components/list.zig
@@ -391,7 +391,7 @@ pub fn List(comptime T: type) type {
             }
 
             if (self.cursor >= self.filtered_indices.items.len and self.filtered_indices.items.len > 0) {
-                self.cursor = self.filtered_indices.items.len - 1;
+                self.cursor = 0;
             }
             self.ensureVisible();
         }

This is the behavior after the change:

After.changes.mp4

Nice library, btw. Thanks a lot!