CharacterMap: Tweak layout & style of "find character" window

Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/3ad498f2e0

Userland/Applications/CharacterMap/CharacterSearchWindow.gml

@@ -1,8 +1,13 @@
 @GUI::Frame {
-    layout: @GUI::VerticalBoxLayout {}
+    layout: @GUI::VerticalBoxLayout {
+        margins: [2, 0, 0, 0]
+    }
     fill_with_background_color: true
 
-    @GUI::Toolbar {
+    @GUI::Widget {
+        layout: @GUI::HorizontalBoxLayout {}
+        preferred_height: "fit"
+
         @GUI::TextBox {
             name: "search_input"
         }
@@ -10,6 +15,7 @@
         @GUI::Button {
             name: "search_button"
             icon: "/res/icons/16x16/find.png"
+            button_style: "Coolbar"
             fixed_width: 22
         }
     }