SiamWellTest: update to version 1.0.3

The interface of interactions with users was improved, loading and processing tools, gas well IPR models were added.

Functionality:

• Clone model function was improved;
• Model improving by total pressure chart was added;
• Analyzable step changing feature was added;
• Rate loading function was extended;
• Data module functions were extended.

Interface:

• Content visualization was improved;
• Chart navigation was improved.

Calculations:

• Gas well IPR models were improved