docs: Improve sections opening with a sweep animation
docs: Improve sections opening with a sweep animation

 * Based upon: https://stackoverflow.com/a/38215801

Change-Id: I95deb965f61b03d2b1beadbb28d97a1edc6cdf0b
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools