a1ca7cf2ca
When sending "Composer" analytics from screens other than the composer's (e.g. send location from map) we need to know the composer's mode in order to properly fill the analytics event. `MessageComposerContext` hoists this state so that other presenters can also read it. Related to: https://github.com/vector-im/element-meta/issues/1674 https://github.com/vector-im/element-meta/issues/1682