Fix option history to full closes only, 2-decimal USDC, restore hide-delete.

Filter OKX positions-history to type 2/3/6, format premium and bid recovery to 2 decimals, and allow locally hiding rows via delete button.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/common/static/instance_theme.css

@@ -3727,6 +3727,11 @@ html[data-theme="light"] .options-estimate-row {
 .opt-history-table td:nth-child(6) {
   width: 20%;
 }
+.opt-history-table th:nth-child(7),
+.opt-history-table td:nth-child(7) {
+  width: 8%;
+  text-align: center;
+}
 .opt-hist-time {
   font-size: 0.64rem;
   white-space: nowrap;