### Problem description
Currently when errors are found the entire line where the error occurred
is highlighted and one has to look at the error message in order to find
where the error is located on the line. With this PR the line will no
longer be highlighted and the location of the error will be marked with
an red waved line under the error location. Hovering over the text where
the error occurred produces an error overlay so if several errors occur
on the same line they can all be seen separately.
### Implementation description
The definition of error marker was switched to include column and size
as well as line and message like before.
This change required changing the way view pattern editor draws the
error markers because the errors themselves don't have size information.
Also, a new errorHoverBoxes type was defined to help in the detection of
the floating error messages when error is hovered.
Note that the underwave code depends on having a monospaced. If font is
not monospaced the underwaved text can be short/long or displaced.
### Screenshots
### Problem description
https://gitlab.freedesktop.org/mesa/mesa/-/issues/11135
It turns out LLVMpipe only supports 4x multisampling. Checking
GL_MAX_SAMPLES seems like the right thing to do.
### Implementation description
~~Right now, I only check GL_MAX_SAMPLES. Depending on the format, we
might need to check GL_MAX_INTEGER_SAMPLES. I don't know how likely it
is that you might want to use a different format in the future,
glGetInternalformativ might be a safer option to retrieve the max number
of samples we can use.~~
Ended up implementing it with glGetInternalformativ.
### Additional things
I guess I could merge the ```if```s at lines 95, 99 and 103 in
imgui_imhex_extensions.cpp while we're at it.
---------
Co-authored-by: Nik <werwolv98@gmail.com>
