grunt on previous ms scroll fix. fixes 9969: add support for output element. fix 9941

BS3 commits adac269f950b6b75056ea8d578c5b3f179b712c7,
9733a998e2b4933692cb453e9869c80d1043b6f6,
fc0e7686fba0ea64719ae968585b0e4846ea0c8b
fixes 9969: add support for output element. fix 9941

BS3 commits 9733a998e2b4933692cb453e9869c80d1043b6f6,
fc0e7686fba0ea64719ae968585b0e4846ea0c8b
Use jekyll var for current version in docs; update banner in gruntfile to match .less banner

BS3 commit 48d929d69edf06fd0b02e05522e0c8efe6b5b77f
fix form. Rearrange helper classes docs section; add subnav list items to docs side nav. Document .hide-text and .text-hide. Document .hide-text and .text-hide. Deprecate .hide-text mixin for .text-hide as mixin and class. Use jekyll var for current version in docs; update banner in gruntfile to match .less banner. follow up to 9963 and 10005: update docs to use .screen-*-min vars, update customizer as well; run grunt to adjust raw files

BS3 commits c1ddb06de78c265e4d8bad0216911b386c543633,
7a7149d2eef386912e497907e1b2322ee98c0234,
e25ca1e7a9ce7beaf5227b920913ec10a74a300e,
e25ca1e7a9ce7beaf5227b920913ec10a74a300e,
6de67c0ab60bc94931def838de2e66764d4838ea,
48d929d69edf06fd0b02e05522e0c8efe6b5b77f,
ddd594c6e2a952bfb10f2a8f4aad678e3e15174f
fixes 9876: avoid dropdowns in navbar examples to prevent overlap

BS3 commit 705f7ba2790c4809fe8f04b717830e338d3fae40
follow up to 9963 and 10005: update docs to use .screen-*-min vars, update customizer as well; run grunt to adjust raw files

BS3 commit ddd594c6e2a952bfb10f2a8f4aad678e3e15174f
Use jekyll var for current version in docs; update banner in gruntfile to match .less banner

BS3 commit 48d929d69edf06fd0b02e05522e0c8efe6b5b77f
fixes 10095: note about backwards incompatibility. Use jekyll var for current version in docs; update banner in gruntfile to match .less banner

BS3 commits c4f1591e70bc7849a533cd7d3f81bd7960ca7448,
48d929d69edf06fd0b02e05522e0c8efe6b5b77f
complete missed </td>. Use jekyll var for current version in docs; update banner in gruntfile to match .less banner

BS3 commits b67e49367a820f7165e3cf8087d584e9792b3c8c,
48d929d69edf06fd0b02e05522e0c8efe6b5b77f