New necessary methods in Text util module

For some next features this will be used, the removeSpanTags method now
is a alias for stripTags.
Showing the events creator avatar in popup events list
Changes in summary lenght in popup events list

This commit change the name display for only the first name for more
space for summary.
Created the inbuilt comments preview in events popup

This commit introduces the comments preview in events popup for more
efficient workflow.
Added "time ago" information in comments preview