[BUG] Disabling trigger and selecting a different event causes UI z-index bug

**Describe the bug**
I think I found a UI bug in disabled workflow triggers

**To Reproduce**
Steps to reproduce the behavior:
1. Create a new workflow
2. Add a (cron) trigger as the first step
3. Run a few sample events
4. Disable the trigger
5. Click on "select a different event"

**Expected behavior**
1. I did not expect any of the fields in the disabled trigger to be selectable.
2. I expected the dropdown to be on top of the main trigger UI

**Screenshots**

**Desktop (please complete the following information):**
- OS: macOS 13.2.1
- Browser: 112.0.5615.121 (Official Build) (arm64)

**Additional context**
Ya'll got some real fun stuff with the z-indices going on there, good luck!