[settings] fix custom localization of setting labels/options

[Montellese]

Right now any settings dialog deriving from CGUIDialogSettingsBase can provide its own localization implementation for setting labels etc. This works great but I did not consider the labels used as part of the setting controls which currently all use g_localizeStrings instead of the settings dialog's specific localization implementation. This PR fixes it by passing an ILocalizer interface implementation to all the relevant parts of the settings GUI code.

Right now probably nobody will notice this because all strings are available through g_localizeStrings but it's inconsistent with the initial idea and it will fail when migrating add-on settings to core's settings system. Therefore there's no need for a backport to Krypton.

Types of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the Code guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the CONTRIBUTING document
• I have added tests to cover my change
• All new and existing tests passed

[Montellese]

jenkins build this please

[Montellese]

Any objections? jenkins was happy before he was struck down ;-)