How to rename the stalling / hold timers in the scoreboard
You can set the name of the stalling / hold timer from the scoreboard settings. The settings are accessed, either directly when creating the bracket, or editing an existing one.
When creating the bracket
From the registrations view, select a group and click "Create bracket".
Editing an existing bracket
Visit the bracket in question, and click the blue 'Edit' button in the right corner.