1.add time filter for log
2. add timeHelper test
3. add related reference
1. simply timeToLong covert logic
2.fix the test
3.update the reference in log page
1. remove minute filed for simplicity
2. modify reference in log page
1.remove all logic for flexible timing input
2. rename timeTaken in inner class to timing
3.update reference in adminActivityLogPage
rename inner class boolean type attributes
UI tweak of instructorCourseDetails
adjustment of tests
pass courseDetailsPageUiTest
instructorCourseEditPage
instructorCommentsPage
additional small change
Merge branch '75567448' into AccessControl
[2271]admin can filter log by timeTaken

fixes #2271
Merge branch 'dev' into AccessControl
Merge branch 'master' into AccessControl

Conflicts:
	src/test/resources/pages/studentCourseJoinConfirmationHTML.html
dev green
Merge branch 'dev' into AccessControl

Conflicts:
	src/test/resources/pages/studentCourseJoinConfirmationHTML.html
Merge branch 'master' into AccessControl
Merge branch 'dev' into AccessControl
changed default image so that the words are more visible