Fix diagram on PV Shading and Layout page to show example of both portrait and layout orientation.

Fix layout messages to avoid overlapping text when multiple subarrays have layout issues.

Fixes #1688

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings