fix(plugins/plugin-client-common): WatchPane has incorrect padding

Fixes #5015

Author: myan9

plugins/plugin-client-common/web/scss/components/Terminal/Pinned.scss

@@ -33,6 +33,7 @@ $table-grid-cell-size: 1.375em;
 /** special styling of input area for pinned scrollbacks */
 .repl-block[data-pinned] {
   margin: 0;
+  padding: 0;
   position: relative;
 
   /* css magic for inner scrolling (see above and below for more magic rules) */