PluginView: refactor the ui to a better view

resources/icons/plugins_default_icon.svg

resources/images/default_plugin_background.jpg

src/app/commoncomponents/PreferenceItemDelegate.qml

src/app/commoncomponents/ResponsiveImage.qml

src/app/constant/JamiStrings.qml

src/app/constant/JamiTheme.qml

src/app/mainview/components/CachedImage.qml

src/app/mainview/components/CallActionBar.qml

src/app/mainview/components/ChatViewHeader.qml

src/app/mainview/components/PluginHandlerPicker.qml

src/app/pluginadapter.cpp

src/app/pluginadapter.h

src/app/pluginlistmodel.cpp

src/app/pluginlistmodel.h

src/app/pluginversionmanager.h

src/app/settingsview/components/PluginAvailableDelegate.qml

src/app/settingsview/components/PluginListView.qml

...app/settingsview/components/PluginPreferencesListView.qml

src/app/settingsview/components/PluginPreferencesView.qml

src/app/settingsview/components/PluginSettingsPage.qml