Improve new editor keyboard shortcuts, especially on mac

[ffissore]

Starting from @damellis suggestions: #3019 (comment)

[damellis]

Three in particular that would be nice to fix:
Alt-Backspace should delete the word preceding the cursor. (This works in 1.6.4).
Command-E should use the current selection for find. (This works in 1.6.4.) Also, Command-F should not use the current selection for find; it should use the previous find text. (This is wrong in 1.6.4, too.)
Command-Up should go to the start of the file; Command-Down to the bottom. (This doesn't work in 1.6.4 either.)

[ffissore]

Alt-Backspace restored. Available in next hourly build

[damellis]

Thanks!

[damellis]

Whoops, maybe I spoke too soon... it looks like this is deleting the word in front of the cursor, instead of behind it.

[ffissore]

Whoops sorry. I coded that on purpose because I read your comment... Ehm...
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Il giorno 13/mag/2015 18.47, "David A. Mellis" notifications@github.com
ha scritto:

Whoops, maybe I spoke too soon... it looks like this is deleting the word
in front of the cursor, instead of behind it.

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#3098 (comment).

[damellis]

I probably wasn't clear. Sorry about that!

[ffissore]

Fixes pushed. From your comment I miss only CMD+J: what does it do?

[damellis]

Thanks again!

One minor nitpick: Cmd+E shouldn't open the Find dialog; it just sets the Find text (e.g. for use by subsequent Cmd+G commands).

In the current build, Cmd+J concatenates the next line onto the end of the current line. I find the equivalent behavior (J-key) useful in Vi, but here it seems out of place. Also probably a minor nitpick.