Fix a bug where mIRC colors are serialized wrong, improve performance

...n/java/de/kuschku/quasseldroid/ui/chat/ToolbarFragment.kt

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

.../quasseldroid/ui/chat/info/channel/ChannelInfoFragment.kt

...uschku/quasseldroid/ui/chat/info/user/UserInfoFragment.kt

.../kuschku/quasseldroid/ui/chat/input/AutoCompleteHelper.kt

...de/kuschku/quasseldroid/ui/chat/input/ChatlineFragment.kt

...e/kuschku/quasseldroid/ui/chat/messages/MessageAdapter.kt

...chku/quasseldroid/ui/chat/messages/MessageListFragment.kt

.../kuschku/quasseldroid/ui/chat/messages/MessageRenderer.kt

...u/quasseldroid/ui/chat/messages/QuasselMessageRenderer.kt

...de/kuschku/quasseldroid/ui/chat/nicks/NickListFragment.kt

...va/de/kuschku/quasseldroid/ui/chat/topic/TopicFragment.kt

.../kuschku/quasseldroid/util/irc/format/ContentFormatter.kt

...hku/quasseldroid/util/irc/format/IrcFormatDeserializer.kt

...schku/quasseldroid/util/irc/format/IrcFormatSerializer.kt