User-Agent:       Opera/9.80 (X11; Linux x86_64; U; en) Presto/2.10.229 Version/11.60
Build Identifier: 0.4.8

Sometimes I accidentally click the 'Close this tab' button when switching tabs. As a lot of advanced users close their tabs by pressing Ctrl-d I think (at least I do) there is no need for this button for them.
I would like to have a configuration option

[ ] Disable 'Close this tab' button on tabs

This option should be unchecked by default, though.

Reproducible: Always

Steps to Reproduce:
1. Click tabs to change
2. accidentally click the 'Close this tab' button
Actual Results:  
Tab closes

Expected Results:  
Accidentally closing the tab should not be possible.