Prep for pin drop location sharing (#7919)

* add labs flag feature_location_share_pin_drop

Signed-off-by: Kerry Archibald <kerrya@element.io>

* split LocationButton into two components

Signed-off-by: Kerry Archibald <kerrya@element.io>

* rethemendex

Signed-off-by: Kerry Archibald <kerrya@element.io>

* copyright

Signed-off-by: Kerry Archibald <kerrya@element.io>

* one more (c)

Signed-off-by: Kerry Archibald <kerrya@element.io>

* i18n

Signed-off-by: Kerry Archibald <kerrya@element.io>

* empty line

Signed-off-by: Kerry Archibald <kerrya@element.io>

* use same matrix client import

Signed-off-by: Kerry Archibald <kerrya@element.io>

src/settings/Settings.tsx

@@ -399,6 +399,13 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         displayName: _td("Don't send read receipts"),
         default: false,
     },
+    "feature_location_share_pin_drop": {
+        isFeature: true,
+        labsGroup: LabGroup.Messaging,
+        supportedLevels: LEVELS_FEATURE,
+        displayName: _td("Location sharing - pin drop (under active development)"),
+        default: false,
+    },
     "baseFontSize": {
         displayName: _td("Font size"),
         supportedLevels: LEVELS_ACCOUNT_SETTINGS,