Bug Fixes for Excel range settings

[derekagorhom]

Fixes #9370
Fixes #9293
I have implemented the range option when selecting multiple excel sheets and also when importing the default is to tick the first sheet.
@rdstern , @N-thony can you review this
Thanks

[jkmusyoka]

@derekagorhom Were these changes ready to be tested? The range option still does not work for multiple excel sheets. And the first sheet is not ticked by default.

[derekagorhom]

@jkmusyoka below are screenshots from my PR
when you load the dataset into the import dialog:

when you select the range:

[jkmusyoka]

@derekagorhom that's interesting!

@rdstern can you test these changes from your end and let us know? Maybe I am missing something.

I am using Excel file from Petauke to test. It is attached.

For the range, specify A4:G35 and try to import any 2 sheets in the file into R-Instat.

The changes made by Derrick don't seem to appear on my end.

petauke missing data moffat.xlsx

[rdstern]

@derekagorhom I am adding the file I used for testing:

msekera agro met.zip

Here is what it looks for me:

a) Good that the first sheet is selected.
b) But not-so-good, that underneath it says No Sheet Selected - which is is! And also Preview not implemented for this file type because there is a preview option for excel file types.
c) Good: I then selected Oct2022 instead - and that looks fine as below:

d) Not so Good: Can you see the focus is still on the first row. I could not get to this (from Version 0.8.2):

e) Also not good. When I was in October 2022 and changed the Rows to skip from 0 to 1, then I lost the preview.

f) And when I ticked the 5th sheet it also (as a bonus) ticked the first sheet for me. You seem very insistent that the first sheet should be re-ticked at various opportunities!

f) So, at the beginning the first sheet should have the focus. After that it is ok if it loses the focus. And the getting the focus should noit interact with the other controls.

g) Now to the range: That's A4 to G35 for the 4th and 5th sheets. Aha, that now seems to work. Well done on that bit.

[derekagorhom]

@rdstern please i have made the changes
can you review them
thanks

[rdstern]

@derekagorhom well done.
@jkmusyoka do you want to check too, or wait till it is merged?
@N-thony could you check the code, and merge if ok. Thanks

[N-thony]

@rdstern @derekagorhom, when I import the file you have attached above, I get this with the first sheet selected but the OK button is disable. I had to uncheck and check/select this sheet or any other to get the OK button enabled.

[rdstern]

Thanks and well spotted @N-thony. Good that we need 2 checkers before merging and I really should have noticed that myself. I must be more careful in the future.

[derekagorhom]

@rdstern , @N-thony Please i have implemented the ok button when the first sheet is checked