Increase default allocation limit for images to 144 MB

Currently the allocation limit for images is set to 128MB. The limit of 128 is sufficient for an 8k 32 bps image (7680 px * 4320 px * 32 bpp / 8'388'608 = 126 MB).

Some of our customer load images that are used as a background for A4 pages or letter pages with a resolution of 600 dpi. This led to an allocation of 132 MB (4061 px * 7016 px * 32 app / 8'388'608 = 132.76 MB). Because of that I'm suggesting to increase the default allocation limit to something above 132 MB, like 144 MB.