[chore] Directive Fixes
- Added case to handle when RiseVision exists but, RiseVision.Common doesn't
- Enabled bfhselectbox in directive link function
[feature] added font-size-picker angular directive and updated gulpfile build task to take into account both directives
[feature] added tests for font-size-picker directive
[chore] renamed directive file names and restricting directives to E only