Scripts and sub dialogue for gt Table

[Vitalis95]

Fixes partially #8541
@rdstern , this is @Fidel365 pull request, I managed to solve the merge conflicts

[rdstern]

@lilyclements we have - at last - got the beginnings of the table-sub-dialog to test.
a) Bits do seem to work
b) I notice the Font button only appears when you click somewhere after entering, say, a title. I think it could be visible always?
c) I tried stub, without knowing whether my table was suitable. The footnote appeared, but not the stub label?

@lilyclements can you check, and then can you suggest the next steps, or do we need to discuss first. @Patowhiz is going to do the font part, hopefully starting next week?

[Vitalis95]

@rdstern , take a look

[N-thony]

@rdstern , take a look

@rdstern could you review this now?

[Vitalis95]

@rdstern , have a look at it now

[rdstern]

@Vitalis95 I was pleased to see this is working again, and with the themes which is extensive. @Patowhiz has now taken over the tables stuff so leave this one parked for him now.

[Patowhiz]

This has now been replaced by PR #8662

[rdstern]

@Patowhiz should this be closed?

[rdstern]

@Patowhiz should this pull request be closed?

[Patowhiz]

@Vitalis95 kindly close this PR

[rdstern]

@Vitalis95 I am closing this. Ok?