set keyword

This issue is not the same as issue 80704. 

This time, it's question of font metrics: default values are wrong under some
values depending on the display (not obligatory resolution, but probably pixel
size or something I'm not sure to get yet), and some controls (probably not only
combos are not correctly drawn)

The problem is, a lot of things depends on font metrics, including native
controls dimensions.

I did several tests:

Test 1: iMac20" :  1680x1050, and other résolutions.
No problem, combos are correctly drawn.

Test 2: Mac book pro (1440x900, and other résolutions):  
Problem : the bottom of combos is missing

Test 3: Powerbook G4(1280x854)
Problem: the bottom of combos is missing

Test 4:

In Tools -> Options ->View 

a) uncheck Use System Fonts for User Interface, validate with ok
b) check it again, validate 

=> combo are corectly drawn for ALL machines previously tested

Test 5 

After the issue being workarounded with test4, open a new frame in whatever
machine previously having the trouble.

e.g. :  open tools options again, or a new Writer sheet
=> the issue appears again

To fix that issue, I suggest:

- we should modify the default value ( piwel size or the constant characterizing
the screen resolution)

- we should try to check and apply _sooner_ the font metrics we retrieve from
the system, to avoid new frames using wrong values.

I'll try to find where in the code the problem stays, but maybe Herbert will fix
that more fastly than me ?

Set target 

The root cause of this problem is that ComboBox::ImplCalcEditHeight() in vcl/source/control/
combobox.cxx doesn't take the native widget size into account properly.

Since this method the magic number "4"  must have made some sense sometimes and the method 
contains new code updates to handle the mbNoFocusRects&&noDropDown case I'm afraid that the simple 
fix to just take the bigger of textheight and native widget height would need some regression testing by 
someone who is familiar with the background of the original code.

I commited the fix to CWS aquavclcarbonfixes.
@PL: please verify

Set me in the CC

Issue verified fixed in aquavclcarbonfixes

Closing resolved issue.