fix(devtools): eliminate unnecessary scrollbars on injector tree (angular#59966)

Modify CSS to eliminate unnecessary scrollbars on injector tree

PR Close angular#59966

Author: Den-dp

devtools/projects/ng-devtools/src/lib/devtools-tabs/injector-tree/injector-tree.component.scss

@@ -25,6 +25,10 @@ as-split-area {
   overflow-y: auto !important;
 }
 
+svg {
+  display: block;
+}
+
 :host {
   ::ng-deep {
     .mat-tab-label {