CSS tweak: explicitly setting min-width for images (#1558)

plugins/org.yakindu.sct.doc.user/css/yakindu.css

@@ -107,22 +107,27 @@ body.eclipsehelp {
     .body-container .primary img.tiny {
         width: 23.6%;
         max-width: 23.6%;
+        min-width: 23.6%;
     }
     .body-container .primary img.small {
         width: 38.2%;
         max-width: 38.2%;
+        min-width: 38.2%;
     }
     .body-container .primary img.normal {
         width: 61.8%;
+        max-width: 61.8%;
         min-width: 38.2%;
     }
     .body-container .primary img.large {
         width: 76.4%;
         max-width: 76.4%;
+        min-width: 38.2%;
     }
     .body-container .primary img.full {
         width: 100%;
         max-width: 100%;
+        min-width: 38.2%;
     }
 }