User can customize Buffer size in XY-chart (New Feature WNF-0182)

User can define custom values for XY chart buffer size adding a new keyword is setup.ini file.
To modify the list of buffer size values, modify file C:\iDaq\addons\XYChart\setup.ini
In general section modify the values of the key customBufferSizeValues, separated by a semicolon, as illustrated in following example: customBufferSizeValues=10;20;50;500;1000;5000;3600

XY-Chart uses first channel on X-Axis (Fixed Issue )

When user selects channel N for Y axis and channel M X Axis, with M