Files.app: Move the position of dummy element for measuring the size of text.

ui/file_manager/file_manager/foreground/css/file_manager.css

Index: ui/file_manager/file_manager/foreground/css/file_manager.css
diff --git a/ui/file_manager/file_manager/foreground/css/file_manager.css b/ui/file_manager/file_manager/foreground/css/file_manager.css
index 4f2d276c01f11f775b10ed0ff5a284bd82028b78..738ca493a4ba755909c35ba71c30554a5e767921 100644
--- a/ui/file_manager/file_manager/foreground/css/file_manager.css
+++ b/ui/file_manager/file_manager/foreground/css/file_manager.css
@@ -3,6 +3,7 @@
  * found in the LICENSE file. */
 
 /* The order of z-index:
+ * - -1: text-measure
  * - 2: drag-selection-border
  * - 3: preview-panel
  * - 500: scrollbar
@@ -1964,3 +1965,11 @@ menuitem#thumbnail-view[lead]:not([disabled]) {
 #progress-center li:not(.cancelable) button.cancel {
   visibility: hidden;
 }
+
+.text-measure {
+  pointer-events: none;
+  position: absolute;
+  top: 0;
+  visibility: hidden;
+  z-index: -1;
+}