Allow user to disable confetti animation

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsScreen.kt

@@ -224,6 +224,7 @@ class ListHabitsScreen
     }
 
     override fun showConfetti(color: PaletteColor, x: Float, y: Float) {
+        if (preferences.isConfettiAnimationDisabled) return
         val baseColor = themeSwitcher.currentTheme!!.color(color).toInt()
         rootView.get().konfettiView.start(
             Party(

uhabits-android/src/main/res/values/strings.xml

@@ -233,4 +233,6 @@
     <string name="activity_not_found">No app was found to support this action</string>
     <string name="pref_midnight_delay_title">Extend day a few hours past midnight</string>
     <string name="pref_midnight_delay_description">Wait until 3:00 AM to show a new day. Useful if you typically go to sleep after midnight. Requires app restart.</string>
+    <string name="pref_animations_title">Disable animations</string>
+    <string name="pref_animations_description">Disable confetti animation after adding a checkmark.</string>
 </resources>

uhabits-android/src/main/res/xml/preferences.xml

@@ -67,6 +67,13 @@
                 android:title="@string/use_pure_black"
                 app:iconSpaceReserved="false" />
 
+        <SwitchPreferenceCompat
+            android:defaultValue="false"
+            android:key="pref_disable_animation"
+            android:summary="@string/pref_animations_description"
+            android:title="@string/pref_animations_title"
+            app:iconSpaceReserved="false" />
+
         <ListPreference
                 android:defaultValue="255"
                 android:entries="@array/widget_opacity_entries"