This has actually been on my mind since the introduction of the flexible layout templates, but never gotten to file an issue for it till now.
Currently, one has to click the "Configure row" button, then click the "Change region widths" link, and then select from the available combinations from the dialog:
How about something like this instead?:
The handle would not increment by steps of 1% or anything like that, rather than "snap in place" while being dragged, allowing the user to select between the same predefined widths as before ...just in a way that is more direct/visual, and where the user can quickly configure region widths without having to open/close dialogs, and click though multiple links/buttons to achieve the same result.
GitHub Issue #:
5167
Recent comments
I found a page in the module's Wiki about Custom style formats which shows different approaches how to add "CSS classes applied to HTML tags".
Add CSS classes in the TinyMCE editor?
Oh, and I tried your suggestion to get rid of Mosaic Grid. I changed the view format to "Unformatted list", and you are absolutely right, there are still 9 images when the relationship is there...
Duplicated images in Mosaic Grid view
If I put the relationship back, the empty block disappears: (with the side effect that the other node now has 9 images instead of 3). Again, I have no understanding of what is going...
Duplicated images in Mosaic Grid view