Change mock json to use alwaysFakeOptionals=false

Why: For some complex schemas, the mock library hangs.

This is possibly because of a bug leading to an infinite loop, or more probably because the nature of the schema leading to exponential amount of optional fields to be generated

Setting alwaysFakeOptionals to false fixes this issue for the schema that caused the error

Author: HansMartinJ

frontend/src/components/Topics/Topic/SendMessage/utils.ts

@@ -12,7 +12,7 @@ import AjvDraft4 from 'ajv-draft-04';
 import addFormats from 'ajv-formats';
 
 jsf.option('fillProperties', false);
-jsf.option('alwaysFakeOptionals', true);
+jsf.option('alwaysFakeOptionals', false);
 jsf.option('failOnInvalidFormat', false);
 
 const generateValueFromSchema = (preferred?: SerdeDescription) => {