Vacay drag-to-paint, "Everyone" button, live exchange rates

- Vacay: click-and-drag to paint/erase vacation days across calendar
- Vacay: "Everyone" button sets days for all persons (2+ only)
- Budget: live currency conversion via frankfurter.app (cached 1h)
- Budget: conversion widget in total card with selectable target currency
- Day planner: remove transport mode buttons from day view

client/src/i18n/translations/de.js

@@ -335,6 +335,7 @@ const de = {
   'vacay.dissolved': 'Kalender getrennt',
   'vacay.fusedWith': 'Fusioniert mit',
   'vacay.you': 'du',
+  'vacay.everyone': 'Alle',
   'vacay.noData': 'Keine Daten',
   'vacay.changeColor': 'Farbe ändern',
   'vacay.inviteUser': 'Benutzer einladen',
@@ -569,6 +570,7 @@ const de = {
   'budget.defaultCategory': 'Neue Kategorie',
   'budget.total': 'Gesamt',
   'budget.totalBudget': 'Gesamtbudget',
+  'budget.converted': 'Umgerechnet',
   'budget.byCategory': 'Nach Kategorie',
   'budget.editTooltip': 'Klicken zum Bearbeiten',
   'budget.confirm.deleteCategory': 'Möchtest du die Kategorie "{name}" mit {count} Einträgen wirklich löschen?',

client/src/i18n/translations/en.js

@@ -335,6 +335,7 @@ const en = {
   'vacay.dissolved': 'Calendar separated',
   'vacay.fusedWith': 'Fused with',
   'vacay.you': 'you',
+  'vacay.everyone': 'Everyone',
   'vacay.noData': 'No data',
   'vacay.changeColor': 'Change color',
   'vacay.inviteUser': 'Invite User',
@@ -569,6 +570,7 @@ const en = {
   'budget.defaultCategory': 'New Category',
   'budget.total': 'Total',
   'budget.totalBudget': 'Total Budget',
+  'budget.converted': 'Converted',
   'budget.byCategory': 'By Category',
   'budget.editTooltip': 'Click to edit',
   'budget.confirm.deleteCategory': 'Are you sure you want to delete the category "{name}" with {count} entries?',