[FIX] web: base.css: fixed width for input of file type under oe_avatar

Browsers add different width to input of file type, messing up the usability of the
product formview placing  a 'phantom' box in front of the options. Added a specific
css rule for this case.

addons/web/static/src/css/base.css

@@ -2267,6 +2267,9 @@
   margin: 0;
   padding: 0;
 }
+.openerp .oe_avatar .oe_hidden_input_file input.oe_form_binary_file {
+  width: 90px;
+}
 .openerp .oe_form .oe_form_field_binary {
   display: inline-block;
 }

addons/web/static/src/css/base.sass

@@ -1872,6 +1872,8 @@ $sheet-padding: 16px
             -ms-filter: "alpha(opacity=0)"
             margin: 0
             padding: 0
+    .oe_avatar .oe_hidden_input_file input.oe_form_binary_file
+        width: 90px
     .oe_form
         .oe_form_field_binary
             display: inline-block