text: Title: [Bug]: Checkpoint / LoRA gallery slows down the browser
  Body: ### Checklist
  
  - [X] The issue exists after disabling all extensions
  - [X] The issue exists on a clean installation of webui
  - [ ] The issue is caused by an extension, but I believe it is caused by a bug in the webui
  - [X] The issue exists in the current version of the webui
  - [X] The issue has not been reported before recently
  - [ ] The issue has been reported before but has not been fixed yet
  
  ### What happened?
  
  Since the last release, the checkpoint / LoRA galleries slow down Firefox to the point that Firefox shows a "This site slows down Firefox [stop]" banner at top of the page, if you have many checkpoints/LoRA.
  
  ### Steps to reproduce the problem
  
  1. Have many checkpoints and/or LoRA
  2. Click the Checkpoints or LoRa tab
  
  ### What should have happened?
  
  Before the last release, it had no noticable delay. Now it takes quite some time until the tab switches, the webui gets unresponsive and Firefox warns that the site is slowing down the browser.
  
  If wonder if it previously had some kind of lazy-loading in place that was removed or similar things. I do not even need to scroll in the last, changing the tab from Generation to Lora alone is enough to slow down the browser before I even see the first rectangle. Most Lora do not have preview images but only the standard grey placeholder.
  
  ### What browsers do you use to access the UI ?
  
  Mozilla Firefox
  
  ### Sysinfo
  
  (can add later if needed as I would need to remove sensitive information)
  
  ### Console logs
  
  ```Shell
  (I don't see anything relevant)
  ```
  
  
  ### Additional information
  
  _No response_