install docker-start.cmd to the program's directory

This was meant to have been included as part of
commit c38f335
in pull-request #578. But was not due to an oversight.

Signed-off-by: Somo S <[email protected]>

Author: somombo

windows/Toolbox.iss

@@ -67,6 +67,7 @@ Name: "Git"; Description: "Git for Windows"; Types: full custom; Flags: disablen
 Source: ".\docker-quickstart-terminal.ico"; DestDir: "{app}"; Flags: ignoreversion
 Source: "{#dockerCli}"; DestDir: "{app}"; Flags: ignoreversion; Components: "Docker"
 Source: ".\start.sh"; DestDir: "{app}"; Flags: ignoreversion; Components: "Docker"
+Source: ".\docker-start.cmd"; DestDir: "{app}"; Flags: ignoreversion; Components: "Docker"
 Source: "{#dockerMachineCli}"; DestDir: "{app}"; Flags: ignoreversion; Components: "DockerMachine"
 Source: "{#dockerComposeCli}"; DestDir: "{app}"; Flags: ignoreversion; Components: "DockerCompose"
 Source: "{#kitematic}\*"; DestDir: "{app}\kitematic"; Flags: ignoreversion recursesubdirs; Components: "Kitematic"