psppsheet progress

[Ben Pfaff]

I implemented a number of features in the psppsheet branch
today.  The remaining to-do items are below.

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Both sheets
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Using the arrow keys to move among column head buttons triggers "**
WARNING **: Internal button not found" if you move off-screen.

Primary Selection: Seems to be missing.  (Reported by John
Darrington.)

Switching between Data and Variable view causes the Toolbar to be
redrawn. I guess that's ok.  But it redraws in a funny way.  It seems
to redraw, then insert the buttons one by one, redrawing after each.
Looks distracting.  (Reported by John Darrington.)

Navigation:

    PSPP is missing the ability to go by just one key press to the
    beginning of a case (like pressing HOME in excel or SPSS)

    Gnumeric also uses HOME to go fully left.  So it seems that we are
    in the minority in that for us, it goes to the first row.

    Gnumeric also has the following keybindings that we should
    probably implement (for both sheets):

    Ctrl-Left:  First column
    Ctrl-Right: Last column
    Ctrl-Up:   First row
    Ctrl-Down: Last Row

(Reported by rocko mazuki <address@hidden> and John Darrington.)

Data sheet
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Tab and Shift+Tab should skip over the "new variable" column to the
next or previous row.  (Reported by John Darrington.)

The case buttons at the head of each row should not scroll with the
rest of the row.  (Reported by John Darrington.)

The space to the right of the "new variable" column doesn't look like
the SPSS sheet or like a normal spreadsheet.  (Reported by John
Darrington and Michel Boaventura.)

I think a solid line or some kind of separator beneath the data
sheet's entry/label hbox would make the appearance nicer.  (Reported
by John Darrington and Michel Boaventura.)

If I click on Insert Case, the new case assumes the value of the cell
which is currently selected.  It should have all values empty.  This
happens only on Windows.  (Reported by John Darrington.)