SUMMARY
Right now all layers are by default visible on the Timeline. I would prefer that at least masks should have it disabled by default.

STEPS TO REPRODUCE
1. Create a layer.
2. Add frames.
3. Switch to animation workspace.
4. Add a mask.

OBSERVED RESULT
Mask is visible on the Timeline.

EXPECTED RESULT
Mask should not be visible on the Timeline.

ADDITIONAL INFORMATION
Related, but not the same: bug 413805
Maybe in this case a toggle "Hide masks" would be desirable?


SOFTWARE/OS VERSIONS
Krita

 Version: 4.3.0-prealpha (git 2d4ae8c)
 Languages: pl
 Hidpi: true

Qt

  Version (compiled): 5.11.1
  Version (loaded): 5.11.1

OS Information

  Build ABI: x86_64-little_endian-lp64
  Build CPU: x86_64
  CPU: x86_64
  Kernel Type: linux
  Kernel Version: 5.3.7-050307-generic
  Pretty Productname: Linux Mint 19.2
  Product Type: linuxmint
  Product Version: 19.2

OpenGL Info
 
  Vendor:  "Intel Open Source Technology Center" 
  Renderer:  "Mesa DRI Intel(R) Iris(R) Plus Graphics (Ice Lake 8x8 GT2) " 
  Version:  "3.0 Mesa 19.0.8" 
  Shading language:  "1.30" 
  Requested format:  QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::SwapBehavior(DoubleBuffer), swapInterval 0, colorSpace QSurfaceFormat::ColorSpace(DefaultColorSpace), profile  QSurfaceFormat::OpenGLContextProfile(CompatibilityProfile)) 
  Current format:    QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::SwapBehavior(DoubleBuffer), swapInterval 0, colorSpace QSurfaceFormat::ColorSpace(DefaultColorSpace), profile  QSurfaceFormat::OpenGLContextProfile(NoProfile)) 
     Version: 3.0
     Supports deprecated functions true 
     is OpenGL ES: false 

QPA OpenGL Detection Info 
  supportsDesktopGL: true 
  supportsOpenGLES: true 
  isQtPreferOpenGLES: false 

Hardware Information

  GPU Acceleration: auto
  Memory: 15633 Mb
  Number of Cores: 8
  Swap Location: /tmp

Current Settings

	Current Swap Location: /tmp
	Undo Enabled: 1
	Undo Stack Limit: 30
	Use OpenGL: 1
	Use OpenGL Texture Buffer: 1
	Use AMD Vectorization Workaround: 0
	Canvas State: OPENGL_SUCCESS
	Autosave Interval: 180
	Use Backup Files: 1
	Number of Backups Kept: 1
	Backup File Suffix: ~
	Backup Location: Same Folder as the File
	Use Win8 Pointer Input: 0
	Use RightMiddleTabletButton Workaround: 0
	Levels of Detail Enabled: 1
	Use Zip64: 0