Reflow: DEV-App Enhancements

DEV APP ENHANCEMENTS

Neccessary to properly implement/evaluate features focussing on improving the display of changing text-amounts. Generally the strategy for the visual is, that the layout should be as in the untranslated "source" visual and be optimized for larger text-amounts when segments are translated

a) Add Visualization for the rendered text-fields (currently, only the DETECTED layout can be visualized)

     add Button toggling bodies CSS-class
     colorize rendered textfields via CSS. In tables, colorize alternating in tables by row & column
     special color for paragraphs

b) Add option to fill rendered layout with larger text-amounts to mimic translating to longer languages

     Add Button & two inputs to replace initial text with "Lorem Ipsum":  increase (10% - 50%), variation (0% - 50%)
     Base-Code to create Lorem-Ipsum text with random content and length variation
     Exchange text in all text-fields node-by-node respecting leading/trailing blanks