Userland+LibGUI: Add shorthand versions of the Margins constructor

This allows for typing [8] instead of [8, 8, 8, 8] to specify the same
margin on all edges, for example. The constructors follow CSS' style of
specifying margins. The added constructors are:

- Margins(int all): Sets the same margin on all edges.
- Margins(int vertical, int horizontal): Sets the first argument to top
  and bottom margins, and the second argument to left and right margins.
- Margins(int top, int vertical, int bottom): Sets the first argument to
  the top margin, the second argument to the left and right margins,
  and the third argument to the bottom margin.

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/Applications/FileManager/DirectoryView.cpp b/Userland/Applications/FileManager/DirectoryView.cpp
index b576ba49e0..72a740e5b4 100644
--- a/Userland/Applications/FileManager/DirectoryView.cpp
+++ b/Userland/Applications/FileManager/DirectoryView.cpp
@@ -134,7 +134,7 @@ DirectoryView::DirectoryView(Mode mode)
     , m_sorting_model(GUI::SortingProxyModel::create(m_model))
 {
     set_active_widget(nullptr);
-    set_content_margins({ 2, 2, 2, 2 });
+    set_content_margins(2);
 
     setup_actions();