Revert "Restore original views (hide TXC's tentatively)"

This reverts commit 4858f3cd4a773d721cdb8500cc493d006b3fd262.
Revert "added back default css files"

This reverts commit 06390d614fe088983160982f08ac68b33aa0d694.
Revert "test bootstrap theme"

This reverts commit 59c0a2ecc3bbe025c5dab99c237ea4ef3736a0b4.