I agree with both responses regarding UI and Java's camel case. But, I also came across this since I use JDeveloper for PL/SQL coding as well. JDeveloper has a good interface and integration of SQL Developer inside it. I am hoping Oracle is considering to enhance text editing for JDeveloper. But, in the meantime, I either use another text editor for major changes or retype.
I ran into it just now, when trying to find the icon for Explain Plan. There is a small icon with A/a written on it on icon toolbar of SQL worksheet window in JDeveloper. Works pretty well, changes text to Upper/Lower/InitCap. It also has hot-key on Ctrl+DoubleQuote keys.
I had been using SQL*Developer and JDeveloper. And, now only using JDeveloper and am pretty happy with it.