Merge pull request #14453 from mantidproject/14452_HFIR_4Circle_Reduction_too_wide

After running through the test procedures on Windows it was seen that the Dialog did not resize exactly as it does on *nix systems however, it was not ridiculously over-sized and could be resized by the user. If the current size that it automatically opens at becomes a problem for users then another issue should be written to deal with this, other than that I am happy to merge this.