fix(plugins/plugin-client-common): live tables too thin when sidecar is open

Fixes #4029
Fixes #4031

Author: starpit

plugins/plugin-client-common/web/css/static/Form.scss

@@ -6,6 +6,10 @@
     grid-row-gap: 1em;
     grid-template-columns: repeat(auto-fill, minmax(15em, auto));
     flex: unset;
+
+    .bx--form-item {
+      font-size: 0.875em;
+    }
   }
 
   .bx--text-input {

plugins/plugin-client-common/web/scss/components/Table/tables.scss

@@ -150,6 +150,9 @@ body[kui-theme-style] .repl.sidecar-visible {
   .repl-result {
     width: 100%;
 
+    [data-table-watching] {
+      width: 100%;
+    }
     .bx--data-table-container {
       width: 100%;
       .bx--data-table {