Revert "Add "ajax" file processing"

This reverts commit 2f2124cfd74271899023421fcf46fbdd841816b0.
Revert "Add getBasePath function"

This reverts commit f1a8f27dfc651ceb981a94a0e5b14d3233ea3841.
Revert "Add language to link"

This reverts commit 285ee123a7fce1183bbc18a77f12e74ceff637d0.
Revert "Add changes to support file browser "ajax" changes"

This reverts commit ef4f7b7c8da3b263c0fee84b47093120df8656b4.
Revert "Remove vendor prefix stuff"

This reverts commit e1c608ab88950de0994b4c738364dbc07c23f9b4.
Revert "Add missing variable"

This reverts commit 4084eba8c62758d4f457493978fe5151c051ed8f.
Revert "Fix mobile list button"

This reverts commit 53f7a9e6692ead8580af27e03ac80c934786323f.
Revert "Change method="dragupload" to method="inline" on upload url"

This reverts commit 4f3b1b3880e1114c455e1e6b09d2d13607901aef.
Revert "Fix upload insert option"

This reverts commit 45d33d08b73b7ccfe8fa99276a018c58a28964d1.
Revert "Cleanup JSON callback"

This reverts commit c5e1b03e16c22ffbd2846d6079745dc48b2ffe4d.
Revert "Use pathinfo to get file extension and name"

This reverts commit f550249e6f074e46f6fb39e6cea35e0316451924.
Revert "Upgrade Codemirror to 3.12"

This reverts commit acc66dcbccdbde8fe76f20c0afbbcf04eb8da86e.