Update Rhs2116StepSize automatically, and check zooming boundaries fo…

…r waveforms

- Step size is no longer selectable; users enter a target amplitude, and the smallest possible step size is chosen automatically
  - Step size is now only updated during `Add Pulses`; existing amplitudes are preserved if possible, or removed if they are incompatible with the new step size
- Cathodic / anodic amplitudes are now processed correctly if `Biphasic Symmetric` is unchecked
- Added a parsing check for the data grid view in case the user tries to manually enter a value outside of the bounds of a byte
- Add icon to dialogs
- Reversed Y-axis orientation for waveforms
- The waveform now zooms in on the cursor, and has boundaries both zooming in and zooming out

OpenEphys.Onix1.Design/ChannelConfigurationDialog.cs

@@ -144,10 +144,10 @@ private void CenterAxesOnCursor(ZedGraphControl zedGraphControl)
 
             var currentMousePosition = TransformPixelsToCoordinates(mouseClientPosition, zedGraphControl.GraphPane);
 
-            var centerX = CalculateScaleRange(zedGraphChannels.GraphPane.XAxis.Scale) / 2 +
+            var centerX = CalculateScaleRange(zedGraphControl.GraphPane.XAxis.Scale) / 2 +
                 zedGraphControl.GraphPane.XAxis.Scale.Min;
 
-            var centerY = CalculateScaleRange(zedGraphChannels.GraphPane.YAxis.Scale) / 2 +
+            var centerY = CalculateScaleRange(zedGraphControl.GraphPane.YAxis.Scale) / 2 +
                 zedGraphControl.GraphPane.YAxis.Scale.Min;
 
             var diffX = centerX - currentMousePosition.X;

OpenEphys.Onix1.Design/DesignHelper.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -13,10 +13,10 @@ static class DesignHelper
         /// Given a string with a valid JSON structure, deserialize the string to the given type.
         /// </summary>
         /// <typeparam name="T"></typeparam>
-        /// <param name="channelLayout"></param>
+        /// <param name="jsonString"></param>
         /// <returns></returns>
         #nullable enable
-        public static T? DeserializeString<T>(string channelLayout)
+        public static T? DeserializeString<T>(string jsonString)
         {
             var errors = new List<string>();
 
@@ -29,7 +29,7 @@ static class DesignHelper
                 }
             };
 
-            var obj = JsonConvert.DeserializeObject<T>(channelLayout, serializerSettings);
+            var obj = JsonConvert.DeserializeObject<T>(jsonString, serializerSettings);
 
             if (errors.Count > 0)
             {