Tune min widths

jet/static/jet/css/_changeform.scss

@@ -374,7 +374,7 @@ body.popup .submit-row {
 }
 
 .vIntegerField {
-  width: 5em;
+  width: 6em;
 }
 
 .vBigIntegerField {

jet/static/jet/css/select2/_layout.scss

@@ -5,7 +5,7 @@ $input-height: 32px;
 .select2-container--jet {
   @import "single";
   @import "multiple";
-  min-width: 100px;
+  min-width: 240px;
 
   .select2-selection {
     background-color: $input-background-color;