fix(wm): consider window count when calculating scrolling column width

This commit fixes the stupidest of stupid bugs. Column width
calculations on the Scrolling layout should take the number of windows
into account, especially when lower than the configured column count.

komorebi/src/core/arrangement.rs

@@ -49,7 +49,7 @@ impl Arrangement for DefaultLayout {
                     .and_then(|o| o.scrolling.map(|s| s.columns))
                     .unwrap_or(3);
 
-                let column_width = area.right / column_count as i32;
+                let column_width = area.right / column_count.min(len) as i32;
                 let mut layouts = Vec::with_capacity(len);
 
                 let visible_columns = area.right / column_width;