I regularly search things by dates not shown on the default search tools so this script makes my Googling much more efficent, you've made a great script. The only issue I have with this is the layout of the buttons looks a little messy and could look cleaner. Here's a quick tweak that suits me better and I hope you would consider doing something like this for your script: https://i.imgur.com/QHLdFuk.png
Thanks for initiative. I add your background, more contrast hover text and transition for disappearing columns. (But buttons was not moved because its are placed by idea to set near main common button.) + Github commit
Buttons Layout
I regularly search things by dates not shown on the default search tools so this script makes my Googling much more efficent, you've made a great script. The only issue I have with this is the layout of the buttons looks a little messy and could look cleaner. Here's a quick tweak that suits me better and I hope you would consider doing something like this for your script: https://i.imgur.com/QHLdFuk.png