Feature/bigger icons for mobile / #211

src/App.scss

src/App.vue

src/boot/after_store.js

src/components/delete_button/delete_button.vue

src/components/favorite_button/favorite_button.vue

src/components/post_status_form/post_status_form.vue

src/components/retweet_button/retweet_button.vue

src/components/status/status.vue

src/components/style_switcher/preview.vue

src/components/user_card_content/user_card_content.vue

src/components/user_finder/user_finder.vue

src/components/user_settings/user_settings.vue