Use JS escaping for {ts} calls in a JS context

[braders]

Overview

Use JS escaping for {ts} calls in a JS context.

Before

{ts} was used within a <script> context without the proper escaping strategy. This can cause issues with certain translations.

After

The risk of translations breaking the JS code is reduced.

Comments

This stems from my earlier pull request #22315, where @totten pulled me up on making this very mistake. I was sure I'd seen {ts} calls in JS code without escaping before, so this tidies up the remaining instances to stop others copying this bad practice in future (like I did!)

[civibot]

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[totten]

jenkins, test this please

[totten]

Changes read well. For r-run, I spot-checked a few of the modified screens, and they looked good.