Cleanup composer

...rc/main/java/org/futo/circles/view/MessageComposerView.kt

...main/java/org/futo/circles/view/RichTextComposerLayout.kt

app/src/main/res/drawable/ic_composer_collapse.xml

app/src/main/res/drawable/ic_composer_full_screen.xml

app/src/main/res/drawable/ic_composer_rich_mic_pressed.xml

.../main/res/drawable/ic_composer_rich_text_editor_close.xml

...c/main/res/drawable/ic_composer_rich_text_editor_edit.xml

app/src/main/res/drawable/ic_composer_rich_text_save.xml

app/src/main/res/drawable/ic_quote.xml

app/src/main/res/drawable/ic_rich_composer_add.xml

app/src/main/res/drawable/ic_rich_composer_send.xml

app/src/main/res/layout/composer_rich_text_layout.xml

app/src/main/res/layout/view_preview_post.xml

app/src/main/res/values/colors.xml

app/src/main/res/values/dimens.xml

app/src/main/res/values/strings.xml