Support browsing solutions while frozen #812
Description
Describe your idea
You should be able to use the "previous solution"/"next solution" buttons to browse through solutions while "freeze mode" (disabling computations) is active
Motivation
Eg, you may want to just flick through designs to get an overview of what they look like in target mode, even if they don't have available natural mode structures, but don't want to wait for each one to compute
Proposed Solution
The biggest challenge is that there is a mix of potential data available for each solution. It may have all computations cached, only some, or none. This can affect natural structure, metrics (eg, specbox), constraints, etc.
We should be able to show what information we do have available, while marking areas we don't have data as unavailable
Other Information
The previous "broken" implementation of this was disabled in #811 (more details there)