added threshold edits in dialogue and removed typo
changed searchByContent() signature
checking threshold values from dialogue and evaluating accordingly
added output of collapsible node ids
added validators and tooltips for input params
added eps value to thresholds to avoid tests for 0.0
added missing include
adjusted comment wording
fixed typo
Merge pull request #530 from rinkk/MeshValidationMargins

Mesh Validation Margins