Added hover style

I18N Commander/App/theme/tabs/tab_hover_style_box_flat.tres

@@ -0,0 +1,13 @@
+[gd_resource type="StyleBoxFlat" format=3 uid="uid://cv1sqjb5pjrov"]
+
+[resource]
+content_margin_left = 48.0
+content_margin_top = 24.0
+content_margin_right = 48.0
+content_margin_bottom = 24.0
+bg_color = Color(0.39, 0.39, 0.39, 1)
+border_width_left = 6
+border_width_top = 12
+border_width_right = 6
+border_width_bottom = 12
+border_color = Color(0.2, 0.2, 0.2, 1)