Simplify currency row menu labels, add move to top/bottom

Move up/down/Remove no longer repeat the currency code in the menu item
text — the row's own field already shows it right next to the button.
Also adds Move to top / Move to bottom, enabled under the same conditions
as the existing up/down actions.

Switches from material-icons-core to material-icons-extended: the core set
is a bare ~50-icon subset with nothing suited to "move to top/bottom" (no
double-chevron or vertical-align icons), so KeyboardDoubleArrowUp/Down
needed the fuller set.

Compose-only: the native SwiftUI screen has no three-dot menu, it uses
native list reordering instead.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QpjMKWGoiT5aJBzhxvXkwp

shared/build.gradle.kts

@@ -71,7 +71,7 @@ kotlin {
             implementation(libs.compose.runtime)
             implementation(libs.compose.foundation)
             implementation(libs.compose.material3)
-            implementation(libs.compose.materialIconsCore)
+            implementation(libs.compose.materialIconsExtended)
             implementation(libs.compose.ui)
             implementation(libs.compose.uiToolingPreview)
             api(libs.moko.resources)