Update controlbar measures and variables
Delete space between arrow indicating active tab and list
Set new responsive chapter-tab measures
Decrease size of active tab arrow
Add transition for responsive toggle icons font-size scaling
Tab header is fixed when scrolling down tab content
Fix responsive measures for info tab
Replace fixed px measure for variable to keep image ratio
Set adaptive sizes for profile icons

The default icon-font-size can be changed globally while keeping the
ratio of the icon’s height and width.
The icons resize within three different breakpoints.
Set smaller layout measures, add adaptive behavior to share tab elements

- Hide the share option images when screen size is too small.
- Set smaller layout dimensions to tab elements and share footer
Minor css fixes for controlbar
Download Tab: Gets adaptive layout and smaller dimensions
Download tab: Minor css fixes for responsive button + select
Fix css bug in titlebar

Set margin auto top and bottom to header instead of fixed sizes.
css-fix for FF in togglebar
Delete transition in control bar,

as ugly effects occur in arrow while resizing the window
Add fixed margin to titlebar header

only in mobile screen resolution
'Downsizing' the progressbar: fix measures and proportions