"Property not found" warnings when renaming project in Project Manager

[rumpfc]

Godot version: 3.2 stable

OS/device including version: WIndows 10 x64

Issue description: Many warnings in console when trying to rename a project in Project Manager. After that, the warnings keep popping up at each mouse-over list item.

WARNING: _get: Property not found: rendering/limits/time/time_rollover_secs
     At: core/project_settings.cpp:209
WARNING: _get: Property not found: rendering/quality/shadows/filter_mode
     At: core/project_settings.cpp:209
WARNING: _get: Property not found: rendering/quality/subsurface_scattering/follow_surface
     At: core/project_settings.cpp:209
WARNING: _get: Property not found: rendering/quality/subsurface_scattering/weight_samples
     At: core/project_settings.cpp:209
WARNING: _get: Property not found: rendering/quality/subsurface_scattering/quality
     At: core/project_settings.cpp:209
WARNING: _get: Property not found: rendering/quality/subsurface_scattering/scale
     At: core/project_settings.cpp:209
WARNING: _get: Property not found: rendering/quality/voxel_cone_tracing/high_quality
     At: core/project_settings.cpp:209

Steps to reproduce:

• Open Godot application
• Select a Project in "Project Manager" window
• Click "Rename" button

[Calinou]

Duplicate of #25661.