Bug or intentional behavior for global search?

Bug or intentional behavior for global search?

In the global search field if I type in something and then later go back to edit the query (for example to fix a typo) there seems to be no way to select anything but the entire query, meaning I have to retype the entire query again even if I just needed to add in a letter.  The only workaround I've found is if I click and hold while typing I can prevent the whole search query from being selected.

I've tested this on two different computers using the latest version of Firefox and Opera.