Applications: Remove border from GroupBox margins

Author: https://github.com/frhun
Commit: 54605794f9
Pull-request: https://github.com/SerenityOS/serenity/pull/10246
Issue: https://github.com/SerenityOS/serenity/issues/5887
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/awesomekling

Userland/Applications/Terminal/TerminalSettingsWindow.gml

@@ -10,7 +10,7 @@
         shrink_to_fit: true
 
         layout: @GUI::VerticalBoxLayout {
-            margins: [16, 6, 6]
+            margins: [4]
         }
 
         @GUI::RadioButton {
@@ -34,7 +34,7 @@
         shrink_to_fit: true
 
         layout: @GUI::VerticalBoxLayout {
-            margins: [16, 6, 6]
+            margins: [4]
         }
 
         @GUI::OpacitySlider {
@@ -50,7 +50,7 @@
         shrink_to_fit: true
 
         layout: @GUI::VerticalBoxLayout {
-            margins: [16, 6, 6]
+            margins: [4]
         }
 
         @GUI::SpinBox {
@@ -66,7 +66,7 @@
         shrink_to_fit: true
 
         layout: @GUI::VerticalBoxLayout {
-            margins: [16, 6, 6]
+            margins: [4]
         }
 
         @GUI::ComboBox {