Cleanup and improved code

...in/java/de/kuschku/quasseldroid/service/QuasselService.kt

...hku/quasseldroid/ssl/BrowserCompatibleHostnameVerifier.kt

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

...ava/de/kuschku/quasseldroid/ui/chat/input/EditorHelper.kt

...sseldroid/ui/coresettings/CoreSettingsFragmentProvider.kt

...uasseldroid/ui/setup/accounts/selection/AccountAdapter.kt

...n/java/de/kuschku/quasseldroid/util/backport/codec/Hex.kt

...in/java/de/kuschku/quasseldroid/util/helper/GsonHelper.kt

...sseldroid/util/irc/format/spans/IrcBackgroundColorSpan.kt

...sseldroid/util/irc/format/spans/IrcForegroundColorSpan.kt

...hku/quasseldroid/util/service/BackendServiceConnection.kt

...java/de/kuschku/quasseldroid/util/ui/SeekBarPreference.kt

...in/java/de/kuschku/quasseldroid/util/ui/TextDrawable.java

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

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

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

.../main/java/de/kuschku/libquassel/quassel/LegacyFeature.kt

...java/com/sothree/slidinguppanel/SlidingUpPanelLayout.java