fix layout of checkboxes on Extension Manager dialog fdo#45851
fix layout of checkboxes on Extension Manager dialog fdo#45851

I changed the sizes and the positions of the checkboxes. So there won't be
truncated checkboxes in any languages.

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core