Composer - fix modals, and other tweaks (#4298)

* fix depreciated import

* add animations to old dropdown

* wrap modals in fullwindowoverlay

* move errors inside header

* add background to bottom bar and stop overlap

* nest dialogs on android

* fix android (wrap in gesturehandlerrootview)

* make borders all the same color

* revert threadgate button back to solid

src/view/com/util/BottomSheetCustomBackdrop.tsx

@@ -1,7 +1,7 @@
 import React, {useMemo} from 'react'
 import {TouchableWithoutFeedback} from 'react-native'
 import Animated, {
-  Extrapolate,
+  Extrapolation,
   interpolate,
   useAnimatedStyle,
 } from 'react-native-reanimated'
@@ -21,7 +21,7 @@ export function createCustomBackdrop(
         animatedIndex.value, // current snap index
         [-1, 0], // input range
         [0, 0.5], // output range
-        Extrapolate.CLAMP,
+        Extrapolation.CLAMP,
       ),
     }))