Fixed scrollToLoad, added an input history

app/build.gradle

...chku/libquassel/backlogmanagers/SimpleBacklogManager.java

...va/de/kuschku/quasseldroid_ng/ui/ChatMessageRenderer.java

...main/java/de/kuschku/quasseldroid_ng/ui/MainActivity.java

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

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

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

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

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