[#7259] fixed json field overflow

ui/src/scss/_form.scss

@@ -1248,6 +1248,7 @@ select {
     }
     .cm-editor {
         flex-grow: 1;
+        min-height: 0;
         border: 0 !important;
         outline: none !important;
         .cm-line {

ui/src/scss/_searchbar.scss

@@ -39,9 +39,6 @@
         padding-top: 0;
         padding-bottom: 0;
     }
-    .cm-scroller {
-        max-height: 100px;
-    }
     .cm-editor {
         flex-grow: 0;
         margin-top: auto;