Warning text makes UI editor unusable

[tomlut]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.

The problem

When there is a long list of entities in a card that the Lovelace UI editor does not support the warning text makes the card uneditable. This is with my browser zoomed out to 10%:

Expected behavior

Wordwrap the warning, limit it to the width of the code edit box.

Steps to reproduce

Environment

• Home Assistant release with the issue: Home Assostant OS (NUC) v0.112.4
• Last working Home Assistant release (if known): v0.111
• Browser and browser version: Firefox 78.0.2, also Chrome 84.0.4147.89
• Operating system: Windows 10 Pro

State of relevant entities

Problem-relevant configuration

Javascript errors shown in your browser console/inspector

Additional information

[bramkragten]

Please complete the template, how do I reproduce this?

[tomlut]

Try this:

entities:
  - entities:
      - automation.abb_usage_alert
      - automation.addon_update_available
      - automation.backup_notifications
      - automation.dns_change
      - automation.gpio_bridge_1_disconnection_alert
      - automation.gpio_bridge_1_memory_monitor_alert
      - automation.gpio_bridge_2_disconnection_alert
      - automation.gpio_bridge_2_memory_monitor_alert
      - automation.hacs_update_available
      - automation.hassos_update_available
      - automation.lane_gate_battery_monitor
      - automation.lane_gate_connection_monitor
      - automation.mailbox_battery_monitor
      - automation.mailbox_connection_monitor
      - automation.mains_power_on_alert
      - automation.mains_power_fail_alert
      - automation.memory_monitor_alert
      - automation.processor_use_alert
      - automation.set_light_theme_at_sunrise
      - automation.set_dark_theme_at_sunset
      - automation.shutdown
      - automation.speedtest_alert
      - automation.speedtest_peak_time_check
      - automation.startup
      - automation.supervisor_update_available
      - automation.test_mode_reset
      - automation.update_available
    group_config:
      state_color: true
    head:
      label: Expand
      type: section
    padding: 0
    type: 'custom:fold-entity-row'
show_header_toggle: false
title: Automations - Sysyem
type: entities

[tomlut]

Thank you for the fast response. And apologies, I only remembered I could copy the card contents using raw mode after I posted the issue.