compositor: fix focus edge detection (#13425)

fixes edge detection, making it more relaxed and intuitive

hyprtester/test.conf

@@ -179,6 +179,15 @@ master {
     new_status = master
 }
 
+scrolling {
+    fullscreen_on_one_column = true
+    column_width = 0.5
+    focus_fit_method = 1
+    follow_focus = true
+    follow_min_visible = 1
+    explicit_column_widths = 0.25, 0.333, 0.5, 0.667, 0.75, 1.0
+}
+
 # https://wiki.hyprland.org/Configuring/Variables/#misc
 misc {
     force_default_wallpaper = -1 # Set to 0 or 1 to disable the anime mascot wallpapers