Merge #11448: [gui] reset addrProxy/addrSeparateProxyTor if colon char missing
ce2418f [gui] reset addrProxy/addrSeparateProxyTor if colon char missing (Cristian Mircea Messel)
Pull request description:
If addrProxy or addrSeparateProxyTor do not have a colon in the string
somewhere in the QSettings storage, then attempting to open the options
dialog will cause the entire program to crash.
Fixes #11209
Tree-SHA512: 2d9e6987cf05af3f41033290b61d00920f7fe4a65bea7efd96ed417a8ca7866d248f091e09947cc8aad3a6a4aa8b7777211cfff7f379a62188be50df2c46d4b2