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The loading mask has been replaced with a loading indicator. On devices
or browser windows with a screen width < 720px the loading indicator
will be rendered above the tabbar at left bottom position. Otherwise it
will appear left aligned inside the tabbar.

Zoom elements has been added to feedbackQuestions.QuestionsPanel and
feedbackQuestions.DetailsPanel. The list type of
feedbackQuestions.QuestionsPanel has been changed to custom non
scrollable list in order to keep scroller height on activeitem change. 

HTML DOM Document objects onclick method and touchend, touchmove and
touchstart events has been overwritten in order to prevent accidental
clicks on media elements like images or videos.

Fix also bug concerning mouse scrolling, when returning from freetext
answer panel to showcase question panel.

This feature commit introduces a text scaling option for speakers
showcase question carousel. When the browser window width is >=700px, a
iconed button will be rendered on the bottom right of the carousel. This
buttons reveals a slider field by which the font-size of question text
and answer options can be scaled.