Changes in 5.4.1

[FEATURE] Client: Grouping->Added context sensitive "Add Job" so that new Job gets the group depending in which group you click "Add Job"
[FEATURE] Client: Grouping->Added multiple selection
[FEATURE] Client: Grouping->Multi selection when clicking on group
[FEATURE] Client: Grouping->Added group rename when right clicking at group
[FEATURE] Client: Grouping->Added multiple selection delete Jobs/Tasks
[FEATURE] Client: Grouping->Added multiple selection activate/inactivate Jobs/Tasks

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