Implement chat archive screen

...java/de/kuschku/quasseldroid/dagger/ActivityBaseModule.kt

...e/kuschku/quasseldroid/ui/chat/archive/ArchiveFragment.kt

...kuschku/quasseldroid/ui/chat/buffers/BufferListAdapter.kt

.../quasseldroid/ui/chat/buffers/BufferViewConfigFragment.kt

...rc/main/java/de/kuschku/quasseldroid/util/ColorContext.kt

.../quasseldroid/util/ui/presenter/BufferContextPresenter.kt

...kuschku/quasseldroid/util/ui/presenter/BufferPresenter.kt

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

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

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

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

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

app/src/main/res/menu/context_buffer.xml

app/src/main/res/menu/context_bufferlist.xml

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

...ava/de/kuschku/quasseldroid/viewmodel/ArchiveViewModel.kt

...ava/de/kuschku/quasseldroid/viewmodel/data/BufferState.kt

...u/quasseldroid/viewmodel/helper/ArchiveViewModelHelper.kt

...chku/quasseldroid/viewmodel/helper/ChatViewModelHelper.kt

...u/quasseldroid/viewmodel/helper/QuasselViewModelHelper.kt