fix(ganttDb): change manual end time determination
fix(ganttDb): change manual end time determination

now it just checks if a valid end time was provided and instead of the comparison that went on before.
This needed to be done in order to support manual end dates with inclusive set to true since they don't match anymore as the 'manually' supplied end date is increased by one
knsv/mermaid,knsv/mermaid,gillesdemey/mermaid,gillesdemey/mermaid,gillesdemey/mermaid