fix(android/engine): Fix logic error for updateKMP

feat(web): re-implementation of introductory globe-key help bubble

fix(web): inferred key text + spacebar caption scaling

chore(common): Update whatsnew for 16.0

Co-authored-by: Marc Durdin <marc@durdin.net>

Merge pull request #7780 from keymanapp/fix/cherry-pick/7351-merge-stable-history-to-master-automatically

fix: automatically merge changes to history back to master 🍒

fix(linux): Revert "fix(linux): Fix a warning"

auto: increment beta version to 16.0.110

Commit acab920d didn't really fix
the warning. https://stackoverflow.com/a/2524675/1836776 suggests
to use `%zu` which is what this change does now.

feat(linux): Add symbols file

Co-authored-by: Joshua Horton <joshua_horton@sil.org>

fix(mac): Enable right-alt/option key mapping

Co-authored-by: Marc Durdin <marc@durdin.net>

fix(android/engine): Check if kmp.json is null

fix(ios): make text size of in-app editor consistent with slider

fix(android/engine): Add null check on kmp filename

fix(windows): buttons should be in list in Options tab

fix(windows): arrow keys need to select next/prev item in options tab

auto: increment beta version to 16.0.109

This reverts commit acab920d.

I'm confused - now we're getting the same warning again - claiming
that `size_t` is defined as `long unsigned int` and so we have to
use `%lu`!? Is this related to the platform we're compiling on?
This time, the warning we get is when compiling for x86_64:

```
engine.c: In function ‘get_current_context_text’:
engine.c:224:15: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 5 has type ‘size_t’ {aka ‘long unsigned int’} [-Wformat=]
  224 |     g_message("%s: current context is:%u:%lu:%s:", __FUNCTION__, km_kbp_context_length(context), buf_size, current_context_utf8);
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                                  |
      |                                                                  size_t {aka long unsigned int}
engine.c:224:40: note: format string is defined here
  224 |     g_message("%s: current context is:%u:%lu:%s:", __FUNCTION__, km_kbp_context_length(context), buf_size, current_context_utf8);
      |                                       ~^
      |                                        |
      |                                        unsigned int
      |                                       %lu

```

Reverting the previous fix for now.

Debian/lintian recommends to add a symbols file which allows to
check for API changes. The package build on Jenkins now has an
additional build step that will compare the API of the newly
built package with the committed symbols file and will fail the
build if the API changed and we didn't update the symbols file
yet. The current symbols file gets stored as build artifact, so
it can easily be copied from Jenkins.

During the build of the binary package this check is also run but
won't fail the build.

chore(android): Update Target SDK Version to 31 🍒

fix(developer): cast to prevent ERangeError for failed http reqs in CEF

chore(windows): remove unused options from locales and UI

Fixes #7351.

feat(common/models): directional quote insensitivity

Co-authored-by: Marc Durdin <marc@durdin.net>