🔇 fix: Hide Button Icons from Screen Readers (#10776)

If you've got a screen reader that is reading out the whole page,
each icon button (i.e., `<button><SVG></button>`) will have both
the button's aria-label read out as well as the title from the
SVG (which is usually just "image").

Since we are pretty good about setting aria-labels, we should instead
use `aria-hidden="true"` on these images, since they are not useful
to be read out.

I don't consider this a comprehensive review of all icons in the app,
but I knocked out all the low hanging fruit in this commit.

client/src/components/Files/FileList/FileSidePanel.tsx

@@ -150,12 +150,12 @@ export default function FileSidePanel() {
   return (
     <div className="w-30">
       <h2 className="m-3 text-lg">
-        <strong>Files</strong>
+        <strong>{localize('com_ui_files')}</strong>
       </h2>
       <div className="m-3 mt-2 flex w-full flex-row justify-between gap-x-2 lg:m-0">
         <div className="flex w-2/3 flex-row">
           <Button variant="ghost" className="m-0 mr-2 p-0">
-            <ListFilter className="h-4 w-4" />
+            <ListFilter className="h-4 w-4" aria-hidden="true" />
           </Button>
           <Input
             placeholder={localize('com_files_filter')}