fix mbinput popover and error messages position
- for an unknown reason, bootstrap popover does not work well if
  it is placed as a child of an ngIf-ed element, replace
  temporarily with ng-show.
- improve display of error messages for "textarea" inputs by
  showing them *inside* the container panel.
replace popover for comments with toggable inline text.
remove console logs.
filter only compatible data from projects in bookmark load (draft).
minor code cleanup
remove orphan code corresponding to ProjectDetailCtrl.
add welcome page, remove classification on left, use it for services list.
modify classification template to avoid redundancy with tree.html

TODO: rework this to separate clearly concerns between tree.html and
classification.html - and do not show root term
remove old js build

TODO: add up-to-date one.
show immediate sublevels instead of root term in services classification.