### Problem description
The current edlib submodule references a commit that's not present in
<https://github.com/blawrence-ont/edlib>. This throws off submodule
initialization and makes building an ImHex Flatpak using upstream Git
HEAD require some nasty Git bodges.
### Implementation description
Switching to <https://github.com/Martinsos/edlib> in `.gitmodules` is
all that is necessary, since
<0ddc23ea06>
properly exists.
### Screenshots
_This section was intentionally left blank._
### Additional things
For those curious, I'm currently working around this by manually
appending
```gitconfig
[url "https://github.com/Martinsos/edlib"]
insteadOf = "https://github.com/blawrence-ont/edlib"
```
to
`${flatpak_builder_state}/git/https_github.com_blawrence-ont_edlib/config`
after `flatpak-builder` has cloned the repository and failed. I know
this is a brittle solution.
With only one menu entry and having set it to use the text editor then
the console losses that functionality. Since both the console and the
text editor are on the same view, it follows that they must share the
menu entries. In some cases it is necessary to determine which of the
two editors needs to be processed inside the menu entry itself.
Also an error that caused the creation of invalid coordinates when
console is still empty was fixed by setting coordinates to 0,0 for empty
files. Another problem was that left clicking on the console didn't
select the word under the cursor but it does when left clicking on the
text editor. Now it works in both.
The menu entries on the console were removed completely and swapped with
a call to obtain the default 'edit' menu for the context popup. Also,
the console in write-only, so some of the entries like `Paste` or
`Replace` must be greyed out.
This PR is only to fix the bugs that exist currently. More work is still
needed for:
1) Removing the remaining shortcuts and creating new menu entries for
them and
2) Adding support for `Open` and `Save` in the pattern editor with path
tracking.
I tested all combinations of menus and shorcuts with console and pattern
editor and there were no problems I could detect.
