Userland: Run gml-format

This brings the existing GML files up to spec with the new requirements

Userland/Applications/FileManager/FileManagerWindow.gml

@@ -6,6 +6,7 @@
 
     @GUI::ToolbarContainer {
         name: "toolbar_container"
+
         @GUI::Toolbar {
             name: "main_toolbar"
         }
@@ -13,6 +14,7 @@
         @GUI::Toolbar {
             name: "location_toolbar"
             visible: false
+
             @GUI::Label {
                 text: "Location: "
                 autosize: true
@@ -26,6 +28,7 @@
 
         @GUI::Toolbar {
             name: "breadcrumb_toolbar"
+
             @GUI::Label {
                 text: "Location: "
                 autosize: true
@@ -40,6 +43,7 @@
     @GUI::HorizontalSplitter {
         name: "splitter"
         first_resizee_minimum_size: 80
+
         @GUI::TreeView {
             name: "tree_view"
             fixed_width: 175
@@ -48,6 +52,7 @@
 
     @GUI::Statusbar {
         name: "statusbar"
+
         @GUI::Progressbar {
             name: "progressbar"
             text: "Generating thumbnails: "

Userland/Applications/FileManager/FileOperationProgress.gml

@@ -6,7 +6,7 @@
 
     @GUI::Widget {
         fixed_height: 32
-        layout: @GUI::HorizontalBoxLayout
+        layout: @GUI::HorizontalBoxLayout {}
 
         @GUI::ImageWidget {
             name: "source_folder_icon"
@@ -35,7 +35,7 @@
 
     @GUI::Widget {
         fixed_height: 22
-        layout: @GUI::HorizontalBoxLayout
+        layout: @GUI::HorizontalBoxLayout {}
 
         @GUI::Label {
             text: "Copying: "
@@ -54,7 +54,7 @@
 
     @GUI::Widget {
         fixed_height: 22
-        layout: @GUI::HorizontalBoxLayout
+        layout: @GUI::HorizontalBoxLayout {}
 
         @GUI::Label {
             text: "Time left: "
@@ -82,9 +82,9 @@
 
     @GUI::Widget {
         shrink_to_fit: true
-        layout: @GUI::HorizontalBoxLayout
+        layout: @GUI::HorizontalBoxLayout {}
 
-        @GUI::Widget
+        @GUI::Widget {}
 
         @GUI::Button {
             text: "Cancel"

Userland/Applications/FileManager/PropertiesWindowGeneralTab.gml

@@ -22,7 +22,7 @@
         }
     }
 
-    @GUI::HorizontalSeparator
+    @GUI::HorizontalSeparator {}
 
     @GUI::Widget {
         fixed_height: 14
@@ -177,7 +177,7 @@
         }
     }
 
-    @GUI::HorizontalSeparator
+    @GUI::HorizontalSeparator {}
 
     @GUI::Widget {
         fixed_height: 14