Changes the default of `LV_Z_VDB_SIZE` to 100 percent if
`LV_Z_FULL_REFRESH` is set. Reason is that LVGL will reset the full
refresh flag if the buffer is not equal to the screen size.
Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
Changes the Kconfig symbols for the sys_heap based memory management option
and removes the notion of `BLOCKS` with a more concise single
`LV_Z_MEM_POOL_SIZE` option. Also adds `LV_MEM_CUSTOM` to the lv_conf.h,
since in any option the memory management is considered to be custom.
Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
