Feature request: special "copy text" mode
to allow copy text without using mouse.

How to use:
*  press shortcut to go to copy text mode;
*  select text using standard text editor's keys
    (arrows, shift+arrows, etc);
*  press "Ctrl+c" (or any other key)
    to copy text and exit copy text mode.

How to realize?

When go to "copy text" mode:
*  get text from scroll history;
    may also get character colors and attributes (bold, italics);
*  hide terminal emulator window;
*  in place of terminal emulator window
    show text editor window;
*  insert stored text in text text editor;
*  draw text editor's cursor in position of terminal's cursor;
*  text editor window will handle cursor movement keys.

When leave "copy text" mode:
*  hide text editor window;
*  show terminal emulator window;
*  position of terminal's cursor will not changed.
Advantages:
*  do not need to send any escape sequences to running programs;
*  do not need to move cursor of virtual terminal;
*  console application know nothing about copy text mode.

Any suggestions?

Reproducible: Always