+ added "auto select and copy" for the message history log. If you release the left mouse
button when text is selected in the log and while holding SHIFT it will be copied to
the clipboard instantly.
* If no modifier is pressed, selection works as always (you have to use Ctrl-C or the
context menu to copy it.
* Hold CTRL to instantly insert the selected text in the message input area (plain text)
at the current cursor position (may replace any selection in the input area).
* Hold CTRL-ALT - as above, but inserts formatted text