FORMATTING: Allow to assign Layouts to Master Slides, effectively creating a new "Master Slide+Layout combination" for presentations in LibreOffice Impress

Regardless of layout, when selecting Candy in Master Slides, the background is always the one from Title layout of Candy template

In Impress when selecting a Master Slide, it does not take into account the slide layout.
If I have multiple slides with different layouts and I select a different master slide, it does not adopt the template type for its layout type.

Steps to reproduce:
1 - Open Impress, do not select any template in dialog box,
2 - Create new slides with different layouts ("Title", "Title, Content", "Title and 2 content", etc),
3 - Go to Master Slides in Sidebar and select an "Available for use" Master slide.

Expected behaviour:
Selected Master slide will take layout of slide into account. Example: "Title, content" layout will adopt "Title, content" layout from select Master slide template.

Observed behaviour:
Regardless of slide Layout, implemented Master Slide is always "Title" layout of selected template.
When selecting a different Master Slide to a slide with a layout other than "Title" layout, the background of the slide should NOT be the same as "Title" layout but adopt a different one.