UGENECL starts validating process of External Tools before these tools are loaded

Scenario:

1. Open the UGENE GUI.
2. Open the "External tools" tab of the "Application Settings" dialog.
3. Set all external tools, available for this OS.
4. Import the attached custom tool "my_custom_tool.xml".
5. Close the UGENE GUI.
6. Run command line version of UGENE with the following arguments

   ugene.exe --task=.\data\workflow_samples\NGS\fastqc.uwl --in=.\data\samples\FASTQ\eas.fastq
   

   The run command can be a bit different depending on your OS (only Windows has extension ".exe"), debug/release version (in the debug version executable is named ugenecld) or ".uwl" and ".fastq" files location relatively to the executable of UGENE.
   Expected result: the workflow is run correctly.
   Current result: there are several validation errors:

   FastQC Quality Control: External tool "FastQC" is not set. You can set it in Settings -> Preferences -> External Tools
   
   FastQC Quality Control: External tool "java" is not set. You can set it in Settings -> Preferences -> External Tools
   
   FastQC Quality Control: External tool "perl" is not set. You can set it in Settings -> Preferences -> External Tools
   

The problem happens because some custom tools are imported into UGENE. The workflow validation process starts BEFORE loading of the external tools in this case.