Can detect one sequence with a variable padding

sequenceParser detects 2 sequences like this:

```
sequence.####.jpg      [100:138] 39 files
sequence.###.jpg        [50:99] 50 files
```

Whereas rvls detects one sequence:

```
sequence.50-138@@@.jpg
```

Can we have an EDetection method to choose 'eDetectionSequenceCanHaveVariablePadding'?
