keep previous pen width - this all needs to be refactored really
Merge pull request #152 from wesen/bug/dont-reset-pen-size

keep previous pen width - this all needs to be refactored really
fix the wrong group name when customize shortcuts
add clear button, shortcuts page code refactoring.
Merge pull request #153 from chchwy/bugfix/cant-customize-shortcuts

Bugfix/cant customize shortcuts
Merge branch 'master' into feature/color-picker
Merge branch 'feature/color-picker' of https://github.com/chchwy/pencil2d into feature/color-picker