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### Problem description
<!-- Describe the bug that you fixed/feature request that you
implemented, or link to an existing issue describing it -->
See #2033 (`hex::dec::lzma_decompress` reports an error when
decompressing a small buffer).
### Implementation description
<!-- Explain what you did to correct the problem -->
Set the LZMA decompressor memory limit to 1GiB fixed. Print a warning
when exceeded, and abort with returning `false`.
### Screenshots
<!-- If your change is visual, take a screenshot showing it. Ideally,
make before/after sceenshots -->
Normal result when decompressing a small buffer
Warning message when `memlimit` is exceeded: (Set to 64B here for a
demo)
> W: lzma_decompress memory usage 1114168 bytes would exceed the limit
(64 bytes), aborting
### Additional things
<!-- Anything else you would like to say -->
Is the warning wording OK? I'm not a native English speaker so please
change it if you want to.
Some issues related to the padding added to scroll past the end for
console that has padding added.
Added a shortcut to scroll editors one pixel at a time.
Fixed whole lines always drawn at the top even if scroll value is chosen
so that only a portion of the top line is visible. This caused errors in
horizontal scrolling.
Fixed Ctrl-F Ctrl-G and Ctrl-H messing the editor display.
Fixed the end of the line could not be clicked with mouse
Fixed line numbers and their lines could be displayed at different
heights.
Made numbers that represented lines floats instead of integers to allow
partial line display.
