Live location sharing: set map bounds to include all locations (#8324)

* open a dialog with map centered around first beacon

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

* test dialog opening from beacon body

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

* test beaconmarker

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

* add bounds to Map comp

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

* add focusBeacon to beaconviewdialog, use bounds

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

* lint

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

* use membercolor on beacon view markers

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

* add lnglatbounds to maplibre mock

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

* update snapshots for expanded maplibre Map mock

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

* test map bounds

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

* tidy copy paste comment

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

* add fallback when no more live locations

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

* accurate signature for getBoundsCenter

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

test/components/views/messages/__snapshots__/MLocationBody-test.tsx.snap

@@ -124,6 +124,7 @@ exports[`MLocationBody <MLocationBody> without error renders map correctly 1`] =
                     "_eventsCount": 1,
                     "_maxListeners": undefined,
                     "addControl": [MockFunction],
+                    "fitBounds": [MockFunction],
                     "removeControl": [MockFunction],
                     "setCenter": [MockFunction] {
                       "calls": Array [