[FIX] account: search panel size

=== ISSUE ===

If you navigate to Accounting > Accounting > Journal items and click on
an item in the sidebar, there is an issue with longer number
being hidden by the sidebar. This is mostly due to the fact that
the font-size is now 14px instead of 13.

=== AFTER ===

We simply move the panel width from 50px to 54px. This is calculated
based on the width of `.o_search_panel_category_value`
with a `.o_treeEntry` class (41.12px) + the 6px `padding`
from `.o_search_panel` with a `.account_root` class, so 42px + 12px.

task-3354841
part of task-3326263

closes odoo/odoo#124434

X-original-commit: 3981dc3054dbf47b01825bf9d1fc229dce6dfba7
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/static/src/scss/account_searchpanel.scss

@@ -1,5 +1,5 @@
 .o_search_panel.account_root {
-    flex: 0 0 50px;
+    flex: 0 0 54px;
     padding: 6px !important; // need to override bootstrap ps-4 rule
     scrollbar-width: thin;
     .o_search_panel_section_header {