Resolve "Use activity buttons widgets from flutter_custom_toolbox"

Closes #27

See merge request !28

Resolve "Restore custom font"

Closes #28

See merge request !27

Resolve "Normalize Activity application architecture"

Closes #26

See merge request !26

Resolve "Use ApplicationSettings widgets from flutter_custom_toolbox"

Closes #25

See merge request !25

Resolve "Use flutter_custom_toolbox for common features"

Closes #24

See merge request !24

Resolve "Re-order ABI builds"

Closes #23

See merge request !23

Resolve "Restore internet permission"

Closes #22

See merge request !22

Resolve "Improve build process"

Closes #21

See merge request !21

Resolve "Clean / improve / update code"

Closes #20

See merge request !20

Resolve "Normalize game architecture"

Closes #18

See merge request !18

Merge branch '17-improve-ci-cd-remove-update-step-disable-build-debug-in-master-branch' into 'master'

Resolve "Improve CI/CD, remove "update" step, disable "build-debug" in master branch"

Closes #17

See merge request !17

Resolve "Avoid print calls in production code"

Closes #16

See merge request !16

Resolve "Remove deprecation in flutter gradle plugin"

Closes #15

See merge request !15

Resolve "Use flutter linter and apply lints"

Closes #14

See merge request !14

Resolve "Upgrade framework, build tools and dependencies"

Closes #13

See merge request !13

Resolve "Remove iOS variant"

Closes #11

See merge request !12

Resolve "Upgrade flutter framework and dependencies"

Closes #12

See merge request !11

Resolve "Enable splash screen"

Closes #10

See merge request !10

Resolve "Improve app metadata, include fdroid metadata in repository"

Closes #9

See merge request !9

Resolve "Add virtual keyboard"

Closes #7

See merge request !8