Generalize app dependency error messages.

App dependencies are not exclusive to the BTC app anymore, so we need to generalize the error messages. 

E.g., previously, you would see an error message that you need the Bitcoin app, when trying to install RSK that requires the ETH app.

static/i18n/en/errors.json

@@ -72,8 +72,8 @@
     "description": "Check your device to see which apps are already installed."
   },
   "ManagerAppRelyOnBTC": {
-    "title": "Bitcoin app required",
+    "title": "Bitcoin or Ethereum app required",
-    "description": "Install the latest version of the Bitcoin app before installing this app."
+    "description": "Either install the latest Ethereum app (RSK/WAN/kUSD/POA), or the latest Bitcoin app."
   },
   "ManagerDeviceLocked": {
     "title": "Please unlock your device",
@@ -84,8 +84,8 @@
     "description": "Uninstall some apps to increase available storage and try again."
   },
   "ManagerUninstallBTCDep": {
-    "title": "Sorry, Bitcoin is required",
+    "title": "Sorry, this app is required",
-    "description": "First uninstall apps that depend on Bitcoin."
+    "description": "Uninstall the Bitcoin or Ethereum app last."
   },
   "NetworkDown": {
     "title": "Oops, internet seems down",