fix: enhance layout consistency in default-base.css

- Added new flex utility classes (.flex-wrap, .flex-wrap-reverse, .flex-nowrap, .flex-shrink-0) for improved layout flexibility.
- Removed unnecessary margin-top from pre.up for better spacing consistency.
- This change continues the effort to enhance visual consistency across the plugin.

emhttp/plugins/dynamix/styles/default-base.css

@@ -1759,6 +1759,18 @@ span#wlan0 {
     display: inline-flex;
 }
 
+.flex-wrap {
+    flex-wrap: wrap;
+}
+
+.flex-wrap-reverse {
+    flex-wrap: wrap-reverse;
+}
+
+.flex-nowrap {
+    flex-wrap: nowrap;
+}
+
 .flex-col {
     flex-direction: column;
 }
@@ -1775,6 +1787,10 @@ span#wlan0 {
     flex-direction: row-reverse;
 }
 
+.flex-shrink-0 {
+    flex-shrink: 0;
+}
+
 .justify-start {
     justify-content: flex-start;
 }
@@ -2482,10 +2498,6 @@ span#wlan0 {
         border: 1px solid var(--table-alt-border-color);
     }
 
-    pre.up {
-        margin-top: 0;
-    }
-
     pre {
         border: 1px solid var(--table-alt-border-color);
         margin-bottom: 10px;