Merge bitcoin-core#449: Restore "S" accelerator for "Start on system login" option

25a5814 GUI/Options: Restore "S" accelerator for "Start on system login" option (Luke Dashjr)

Pull request description:

  bitcoin-core#416 changed the option assigned to accelerator key "S", but there's no rationale given.

  Best to leave it alone, and give the new option a new accelerator key.

  Since "R" is already taken for Reset, this shifts the new RPC server option to use "P" instead

ACKs for top commit:
  jarolrod:
    ACK 25a5814
  hebasto:
    ACK 25a5814, tested on Linux Mint 20.2 (Qt 5.12.8).

Tree-SHA512: 2212aa32572cbcbcce78304ffcb1dcfc65f9d7e2ffd6c6a4b65e4a3ca2a8a7cc7505c28314ad46e0bc13b4e3bb3fc61e7e196356d26354f3689fad71fb688b27

Author: hebasto

src/qt/forms/optionsdialog.ui

@@ -33,7 +33,7 @@
           <string>Automatically start %1 after logging in to the system.</string>
          </property>
          <property name="text">
-          <string>Start %1 on system &amp;login</string>
+          <string>&amp;Start %1 on system login</string>
          </property>
         </widget>
        </item>
@@ -192,7 +192,7 @@
           <string extracomment="Tooltip text for Options window setting that enables the RPC server.">This allows you or a third party tool to communicate with the node through command-line and JSON-RPC commands.</string>
          </property>
          <property name="text">
-          <string extracomment="An Options window setting to enable the RPC server.">Enable RPC &amp;server</string>
+          <string extracomment="An Options window setting to enable the RPC server.">Enable R&amp;PC server</string>
          </property>
         </widget>
        </item>