set min-width on spinbutton entries

common/gtk-3.0/3.20/gtk-dark.css

@@ -733,6 +733,9 @@ spinbutton button:active {
 spinbutton:disabled {
   color: rgba(211, 218, 227, 0.45); }
 
+spinbutton:not(.vertical) entry {
+  min-width: 28px; }
+
 spinbutton:not(.vertical):dir(ltr) entry,
 spinbutton:not(.vertical):dir(rtl) button.up {
   border-radius: 3px 0 0 3px; }

common/gtk-3.0/3.20/gtk-darker.css

@@ -732,6 +732,9 @@ spinbutton button:active {
 spinbutton:disabled {
   color: rgba(92, 97, 108, 0.55); }
 
+spinbutton:not(.vertical) entry {
+  min-width: 28px; }
+
 spinbutton:not(.vertical):dir(ltr) entry,
 spinbutton:not(.vertical):dir(rtl) button.up {
   border-radius: 3px 0 0 3px; }

common/gtk-3.0/3.20/gtk-solid-dark.css

@@ -733,6 +733,9 @@ spinbutton button:active {
 spinbutton:disabled {
   color: rgba(211, 218, 227, 0.45); }
 
+spinbutton:not(.vertical) entry {
+  min-width: 28px; }
+
 spinbutton:not(.vertical):dir(ltr) entry,
 spinbutton:not(.vertical):dir(rtl) button.up {
   border-radius: 3px 0 0 3px; }

common/gtk-3.0/3.20/gtk-solid-darker.css

@@ -732,6 +732,9 @@ spinbutton button:active {
 spinbutton:disabled {
   color: rgba(92, 97, 108, 0.55); }
 
+spinbutton:not(.vertical) entry {
+  min-width: 28px; }
+
 spinbutton:not(.vertical):dir(ltr) entry,
 spinbutton:not(.vertical):dir(rtl) button.up {
   border-radius: 3px 0 0 3px; }

common/gtk-3.0/3.20/gtk-solid.css

@@ -732,6 +732,9 @@ spinbutton button:active {
 spinbutton:disabled {
   color: rgba(92, 97, 108, 0.55); }
 
+spinbutton:not(.vertical) entry {
+  min-width: 28px; }
+
 spinbutton:not(.vertical):dir(ltr) entry,
 spinbutton:not(.vertical):dir(rtl) button.up {
   border-radius: 3px 0 0 3px; }

common/gtk-3.0/3.20/gtk.css

@@ -732,6 +732,9 @@ spinbutton button:active {
 spinbutton:disabled {
   color: rgba(92, 97, 108, 0.55); }
 
+spinbutton:not(.vertical) entry {
+  min-width: 28px; }
+
 spinbutton:not(.vertical):dir(ltr) entry,
 spinbutton:not(.vertical):dir(rtl) button.up {
   border-radius: 3px 0 0 3px; }

common/gtk-3.0/3.20/sass/_common.scss

@@ -729,6 +729,8 @@ spinbutton {
   &:disabled { color: $insensitive_fg_color; }
 
   &:not(.vertical) {
+    entry { min-width: 28px; }
+
     button, entry { @extend %linked; }
 
     &:dir(ltr) entry,