PLF-5826: [Forum statistics gadget] Uncaught data error

Fix description:
	- Initiate the first weekly statistic when starting PLF from scratch
PLF-5883: Lose iframe when clicking links in Getting Started and Suggestions applications

Problem analysis
- The window target is currently wrong.

Fix description:
- Set the target to current window.
PLF-5353: Incorrect UI in Login and Account setup forms

Fix description:
* Update and define the text style of these forms.
Merge commit 'd01524238ceb544806170eaaa9d4beaa2f6f364b' into HEAD