v2.19.0

- **File formats:**
   - Add and remove some image types that can be open
   - (Add) `CanProcess` method to know if a file can be read under a format and to allow diferent formats with same extension
   - (Fix) `LiftHeightTotal` and `RetractHeight` was rounding to no decimals and returning wrong values
   - (Improvement) Round all float setters on `Layer` class
   - (Improvement) Decode/encode RAM usage and performance by processing in batch groups
- **Pixel Dimming:** (#262)
   - (Add) Option "Lightening pixels" to add brightness/lightening instead of dimming/subtract pixels
   - (Fix) "Dim walls only" would reset body brightness by increase pixel brightness two times it value
- **Pixel Arithmetic:**
   - (Change) Transpose "Pixel Dimming" to "Pixel Arithmetic"
   - (Improvement) New options and manipulations
- **(Fix) Exposure time finder:**
  - Generate top staircase based on selected measure (px or mm)
  - Zebra bars when used in mm measures, it was using X density instead Y to calculate the thickness
  - Move 'Unit of measure' to 'Object configuration'
  - Custom text with wrong Y position when using out of portion resolutions/LCDs
- **CTBv4:**
  - (Fix) More Unknown fields discovered and implemented
  - (Fix) Reserved table is 384 bytes instead of 420
  - (Fix) When full encoding it was forcing to change to version 3. This also affected convertions. (#263)
  - (Fix) `BottomRetractHeight2` was being set to `BottomRetractSpeed2`
  - (Fix) `RetractHeight2` was being set to `RetracSpeed2`
  - (Fix) The PrintParametersV4 table address
  - (Fix) Generates invalid files to open with Chitubox and printers (#263)
  - (Fix) Better progress report
- **(Add) PrusaSlicer printer notes variables:**
  - BottomLiftHeight2
  - BottomLiftSpeed2
  - LiftHeight2
  - LiftSpeed2
  - BottomRetractSpeed
  - BottomRetractSpeed2
  - BottomRetractHeight2
  - BottomRetractSpeed2
  - RetractHeight2
  - RetractSpeed2
- **UI:**
  - (Add) File - Open current file folder (Ctrl+Shift+L): Locate and open the folder that contain the current loaded file
  - (Improvement) Hide some virtual extensions from file open dialog filters
  - (Improvement) UI: Refresh active thumbnail when changed
  - (Change) Icon for File - Open and Open in a new file
  - (Change) Rename File - Extract to: Extract file contents
- (Upgrade) AvaloniaUI from 0.10.6 to 0.10.7
- (Fix) PW0, PWM, PWMX, PWMO, PWMS: Unable to decode some files with AntiAliasing (#143)

UVtools.Core/GCode/GCodeBuilder.cs

@@ -761,7 +761,6 @@ namespace UVtools.Core.GCode
                 "\r\n"
                 ;*/
 
-            float positionZ = 0;
             var layerBlock = new GCodeLayer(slicerFile);
 
             using var reader = new StringReader(gcode);