Fix 

• Problem with import SND files and bedrock detection. Previously, if multiple comment codes were present on a single data row, some codes could be overwritten and lost. We now prioritize the codes in the range 40 - 43 and St, F, B1 and B2 before other codes like S1, Y2, etc. 
• Fix a problem with not updating the method stop code for CPT, TOT and RP reading SND files.
• Fix missing stop code writing a CPT method to SND file.