Be able to prioritize jobs in the Filter Engine Queue

Same as for the Background Jobs and the Workflow Engine Queue, implement a mechanism that would allow Administrators to change the priority of jobs in the Filter Engine Queue in order to prioritize certain jobs (like saving a task from the Browser Workbench) with respect to others (like segmenting a task, when a new project is being processed). For example, it often happens that when big projects are being processed, thousands of segmentation jobs are queued in the Filter Engine Queue. If users wish to save their work in the Browser Workbench, it can then take more than ten minutes for these save operations to be processed by the FTS server(s). With such a priority mechanism, certain types of jobs could then be prioritized over the others.