Revised the style of the toolbar buttons for better layout on mobile devices. Hid the "Back" button on mobile devices for better layout and saving spaces.

src/accounting/templates/accounting/journal-entry/order.html

@@ -30,7 +30,7 @@ First written: 2023/2/26
 
 {% block content %}
 
-<div class="btn-group mb-3">
+<div class="mb-3 d-none d-md-block">
   <a class="btn btn-primary" href="{{ url_for("accounting.report.default")|accounting_or_next }}">
     <i class="fa-solid fa-circle-chevron-left"></i>
     {{ A_("Back") }}