Docs: Fix time widget's css

Author: bhch

docs/static/css/docs.css

@@ -510,6 +510,7 @@ button.rjf-add-button:hover {
 }
 .rjf-time-picker input {
     max-width: 100%;
+    min-width: 0;
     text-align: center;
     font-size: 0.9rem;
     padding: 2px 2px;