LTM Popup - HTML generation

... generating HTML instead of Template File (to allow translation)
... considering the same Fields, incl. User Defined Metrics as Summary
Page HTML
... aligning Vertical Scroll bars + adding a little space between the
widgest so that Scroll Bars do not touch each other
Merge pull request #931 from Joern-R/pullpopup

LTM Popup - HTML generation