Not sure if this is my ignorance, my failure to upgrade to the latest nightly, or a genuine bug, but here goes:
When I hide the selection filter by dragging the dividing bar down, I am unable to show it again by dragging said bar up again.
I can fix this by deleting the file pcbnew.json from \AppData\Roaming\kicad\5.99.
Video:
Application: KiCad (64-bit)
Version: (5.99.0-12964-g8e5cbc5cf0), release build
Libraries:
wxWidgets 3.1.5
libcurl/7.78.0-DEV Schannel zlib/1.2.11
Platform: Windows 10 (build 19043), 64-bit edition, 64 bit, Little endian, wxMSW
Build Info:
Date: Oct 26 2021 00:00:23
wxWidgets: 3.1.5 (wchar_t,wx containers)
Boost: 1.76.0
OCC: 7.5.0
Curl: 7.78.0-DEV
ngspice: 35
Compiler: Visual C++ 1929 without C++ ABI
Build settings:
KICAD_USE_OCC=ON
KICAD_SPICE=ON