Update elements less aggressively when changing a ui system's style

CHANGELOG.md

@@ -35,6 +35,7 @@ Improvements
 - Avoid unnecessary panel updates by using an Epsilon comparison when scrolling children
 - Allow setting a default text alignment for paragraphs in UiStyle
 - Made custom values of Element.Style persist when a new ui style is set
+- Update elements less aggressively when changing a ui system's style
 
 Fixes
 - Fixed paragraph links having incorrect hover locations when using special text alignments

MLEM.Ui/UiSystem.cs

@@ -59,10 +59,8 @@ namespace MLEM.Ui {
             get => this.style;
             set {
                 this.style = value;
-                foreach (var root in this.rootElements) {
-                    root.Element.AndChildren(e => e.System = this);
-                    root.Element.ForceUpdateArea();
-                }
+                foreach (var root in this.rootElements)
+                    root.Element.AndChildren(e => e.Style = e.Style.OrStyle(value));
             }
         }
         /// <summary>