🔇 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/Nav/SettingsTabs/Data/ImportConversations.tsx

@@ -120,7 +120,7 @@ function ImportConversations() {
         {isUploading ? (
           <Spinner className="mr-1 w-4" />
         ) : (
-          <Import className="mr-1 flex h-4 w-4 items-center stroke-1" />
+          <Import className="mr-1 flex h-4 w-4 items-center stroke-1" aria-hidden="true" />
         )}
         <span>{localize('com_ui_import')}</span>
       </Button>