fixed visual bug in editor toolbar
Added H5P specific fonts.
Removed vertical lines between icons.
Added a small margin to the left of the toolbar.
Adjusted height and size of all icons, they are now bigger, more similar in size and better aligned.
Adjusted size and padding of fonts.
Merge branch 'toolbar-fix' of github.com:h5p/h5p-editor-interactive-video into toolbar-fix
Merge branch 'master' into toolbar-fix
Merge branch 'toolbar-fix'