Remove 8702 entry from Wall of browser bugs

BS3 commits: 7441d3f4c55e9180dcc1f7700fe1c9710213f032
Safari percentages were fixed in v7.1 & iOS 8.0; fixes 14663

BS3 commits: be79bef5270297630c10c3143846038c1d994c3b
Fixes 14227, 14603: Drop translate3d for translate on navbars to avoid iOS rendering problems and ensure a more predictable base styling

BS3 commits: f540569e87134942cc0a4e52f6b79f9dc9b7e968
grunt

BS3 commits: 4969c2055d058ff6b0b110fd59753c7181a4390b
fixes 14654: callout for scrollspy-nav link

BS3 commits: ccecb7cde4f954a8941100b24c1b0c2008088276
grunt. grunt

BS3 commits: 36ebec5e7605f4e0fe7e0caa5149e6d5d2e3b31a,
4969c2055d058ff6b0b110fd59753c7181a4390b
grunt

BS3 commits: 36ebec5e7605f4e0fe7e0caa5149e6d5d2e3b31a