Revert a few commits

Revert "base: fix external sdcard mountpoint"

This reverts commit cba2c6c24b38fb098f0f2fd7e168987ca1f128cb.

Change-Id: I049db6d11c850b119976818dcd29da07018a669b

Revert "core: fix volume panel more button transparency"

This reverts commit 7ff3a697d2281f6c4521521e5d062c89cfed21a2.

Revert "core: add support for translucent volume panel"

This reverts commit 98e77bc43a498c04ab671ee9aad3284f25219f77.