fix(wm): dynamically reserve monitor ring space

This commit makes a small change to dynamically keep reserving space in
the VecDeque that backs Ring<Monitor> until an index preference can be
contained within the current length.

This commit also fixes some clippy lints and adds some allow
annotations.

komorebi-gui/src/main.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::assigning_clones)]
+
 use eframe::egui;
 use eframe::egui::color_picker::Alpha;
 use eframe::egui::Color32;