diff --git a/android_app/app/src/main/res/drawable/preferences_bluetooth.png b/android_app/app/src/main/res/drawable/preferences_bluetooth.png
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diff --git a/android_app/app/src/main/res/drawable/preferences_graph.png b/android_app/app/src/main/res/drawable/preferences_graph.png
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diff --git a/android_app/app/src/main/res/drawable/preferences_measurement.png b/android_app/app/src/main/res/drawable/preferences_measurement.png
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diff --git a/android_app/app/src/main/res/drawable/preferences_reminder.png b/android_app/app/src/main/res/drawable/preferences_reminder.png
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diff --git a/android_app/app/src/main/res/drawable/preferences_users.png b/android_app/app/src/main/res/drawable/preferences_users.png
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