Fix breakages caused by formatter run

The formatter run made many case-sensitive properties lowercase,
which caused a variety of bugs.

BUG: 432245

src/gtk3/widgets/_base.scss

@@ -4,28 +4,28 @@ $ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
 
 * {
   padding: 0;
-  -gtktoolbutton-icon-spacing: 4;
-  -gtktextview-error-underline-color: gtk("@error_color");
+  -GtkToolButton-icon-spacing: 4;
+  -GtkTextView-error-underline-color: gtk("@error_color");
 
   // The size for scrollbars. The slider is 2px smaller, but we keep it
   // up so that the whole area is sensitive to button presses for the
   // slider. The stepper button is larger in both directions, the slider
   // only in the width
 
-  -gtkscrolledwindow-scrollbar-spacing: 0;
+  -GtkScrolledWindow-scrollbar-spacing: 0;
 
-  -gtkscrolled-window-overlay-scrolling: FALSE;
+  -GtkScrolled-window-overlay-scrolling: FALSE;
 
-  -gtktoolitemgroup-expander-size: 11;
-  -gtktreeview-expander-size: 11;
+  -GtkToolItemGroup-expander-size: 11;
+  -GtkTreeView-expander-size: 11;
 
-  -gtktreeview-horizontal-separator: 4;
+  -GtkTreeView-horizontal-separator: 4;
 
-  -gtkwidget-text-handle-width: 20;
-  -gtkwidget-text-handle-height: 20;
+  -GtkWidget-text-handle-width: 20;
+  -GtkWidget-text-handle-height: 20;
 
-  -gtkdialog-button-spacing: 4;
-  -gtkdialog-action-area-border: 0;
+  -GtkDialog-button-spacing: 4;
+  -GtkDialog-action-area-border: 0;
 
   outline-width: 0px;
 }

src/gtk3/widgets/_headerbar.scss

@@ -157,7 +157,7 @@ headerbar {
       padding: 4px 6px;
 
       GtkArrow {
-        -gtkarrow-arrow-scaling: 1;
+        -GtkArrow-arrow-scaling: 1;
       }
 
       .arrow {

src/gtk3/widgets/_menus.scss

@@ -18,7 +18,7 @@
 
 menubar,
 .menubar {
-  -gtkwidget-window-dragging: true;
+  -GtkWidget-window-dragging: true;
   padding: 0px;
   box-shadow: none;
   border-style: none;

src/gtk3/widgets/_scrollbar.scss

@@ -5,8 +5,8 @@
  **************/
 
 scrollbar {
-  -gtkscrollbar-has-backward-stepper: false;
-  -gtkscrollbar-has-forward-stepper: false;
+  -GtkScrollbar-has-backward-stepper: false;
+  -GtkScrollbar-has-forward-stepper: false;
 
   background-color: gtk("@theme_bg_color");
   border-width: 0px 0px;
@@ -55,8 +55,8 @@ scrollbar {
   } //
 
   &.overlay-indicator:not(.dragging):not(.hovering) {
-    -gtkscrollbar-has-backward-stepper: false;
-    -gtkscrollbar-has-forward-stepper: false;
+    -GtkScrollbar-has-backward-stepper: false;
+    -GtkScrollbar-has-forward-stepper: false;
   }
 
   &.overlay-indicator {

src/gtk3/widgets/_toolbar.scss

@@ -4,7 +4,7 @@
  * Toolbars *
  ************/
 %toolbar {
-  -gtkwidget-window-dragging: true;
+  -GtkWidget-window-dragging: true;
   padding: 4px;
   background-color: gtk("@theme_bg_color");
 }

src/gtk3/widgets/_treeview.scss

@@ -49,11 +49,11 @@
  * Tree Views *
  **************/
 treeview.view {
-  -gtktreeview-grid-line-width: 0;
-  -gtktreeview-grid-line-pattern: "";
-  -gtktreeview-tree-line-width: 1;
-  -gtktreeview-tree-line-pattern: "";
-  -gtktreeview-expander-size: 16;
+  -GtkTreeView-grid-line-width: 0;
+  -GtkTreeView-grid-line-pattern: "";
+  -GtkTreeView-tree-line-width: 1;
+  -GtkTreeView-tree-line-pattern: "";
+  -GtkTreeView-expander-size: 16;
 
   border-left-color: gtk("@borders"); // this is actually the tree lines color,
   border-top-color: transparent; // while this is the grid lines color, better then nothing