Add find and replace as an incremental bar

Ctrl+F opens a find bar on the context line: matches highlight in the
grid as you type, the active cell follows the current match, Enter and
Shift+Enter step through them and the count shows on the right. Ctrl+H
adds a replacement field: Enter replaces and moves on, Ctrl+Enter
replaces all as one undo step. Match case, whole cell, regex, formulas
and selection scope are chips toggled with Alt keys or a click. Both
commands are in the Edit menu and the palette.

commit

9424a35a8dfbe0c7494f05f9f25a3bf8dfb41479

parent

f587c4a68cce27baf5e791cf6fce6b9c8cb7abbb

author

Dami <dami.etoile@gmail.com>