* pointermgr: add destructor to state and free buf
if the pointer has a buffer set it wont be freed upon destruction, make
asan more happy by adding a destructor and wlr_buf_unlock it on exit.
* cursormgr: free the animation timer event source
properly free the animation timer event source on destruction.
* compositor: free the critsig event source on exit
properly free the critical signal event source on exit.
* popup: clang format style
clang format.
