Change composer menu

app/src/main/java/org/futo/circles/view/Callback.kt

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

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

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

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

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

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

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

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

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

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

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

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

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