Don't hard-code min-width on form input

The input is also used in editable tree which has the property overflow set to
hidden so if the cell is not large enough the widget is partialy hidden.

src/sao.less

@@ -58,6 +58,11 @@
     & td.form-label {
         white-space: pre;
     }
+    & .form-char, .form-password, .form-integer, .form-float {
+        & input {
+            min-width: 8em;
+        }
+    }
     & td.form-one2many, td.form-many2many {
         vertical-align: top;
     }

src/view.js

@@ -1937,7 +1937,6 @@
                 'type': 'text',
                 'class': 'form-control input-sm'
             }).appendTo(this.el);
-            this.input.css('min-width', '8em');
             this.el.change(this.focus_out.bind(this));
         },
         display: function(record, field) {