Dev tools -> Set state: entity can't be found if there is a leading whitespace
Checklist
- [X] I have updated to the latest available Home Assistant version.
- [X] I have cleared the cache of my browser.
- [X] I have tried a different browser to see if it is related to my browser.
Describe the issue you are experiencing
Mainly this is not a bug, it's an enhancement.
Go to Dev tools -> Set state, type any entity_id into the "Entity" field - but put a leading whitespace:

And no entity is found.
I propose to remove leading whitespaces before search.
Why a whitespace can get there? Because sometimes people copy/paste an entity_id from somewhere and a whitespace may be copied too.
Describe the behavior you expected
Leading whitespaces are removed before search.
Steps to reproduce the issue
Described above.
What version of Home Assistant Core has the issue?
2022.9.4
What was the last working version of Home Assistant Core?
No response
In which browser are you experiencing the issue with?
Chrome 105.0.5195.126
Which operating system are you using to run this browser?
Win10x64
State of relevant entities
No response
Problem-relevant frontend configuration
No response
Javascript errors shown in your browser console/inspector
No response
Additional information
No response
There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates. Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍 This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.
up still present
There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates. Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍 This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.
Up
There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates. Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍 This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.
up
There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates. Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍 This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.
Up
There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates. Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍 This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.
still there
There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates. Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍 This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.
up
Similar issue - https://github.com/home-assistant/frontend/issues/20814