Fix play button positioning on IE 11
Fix play button positioning on IE 11

Broken in v2.5.2 and v2.5.3.

Fixes #2026

Change-Id: Ie516f7d459528024f249eded6dbf2ed0f47a0b0d

tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player