Here's a simple one, but pretty convenient. Could PhpED please keep the selection on the copied text when doing a control-drag? Most editors do this, and it makes it much easier to copy the same text to several locations, for example adding a common prefix to a bunch of lines. As of now you have to reselect the text after each control-drag.

copy-to-clipboard followed by series of paste-from-clipboard would help, right?

No, since that would mean using the keyboard. Sometimes doing multiple copies with the mouse only is more convenient. Don't you like convenient, ddmitrie?

Personally I sticked to my keyboard and don't use mouse too much
Probably, some people find it convenient to drag text with mouse. Well, we'll do it some day.