Fix for #1790.
Submodule GitExtensionsDoc updated

Submodule GitExtensionsDoc:
    > 18d4200 - Change information about where settings are stored.
    < 439e4cb - add section about re-taggin
Update checked property when menu is shown.  This allows the item to be refreshed between instances.
Merge branch 'Portable'
Merge remote-tracking branch 'gitextensions/master' into BuildServerIntegration

Conflicts:
	GitCommands/app.config
Merge remote-tracking branch 'gitextensions-pombeiro/BuildServerIntegration' into BuildServerIntegration
Make Settings.cs changes compatible with 45600a8b1d7122553a89336486271484a7026150.
Merge branch 'pr/n1799_vbjay'
Fixed submodule status on diff tab
Merge remote-tracking branch 'gitextensions/master' into BuildServerIntegration

Conflicts:
	GitUI/CommandsDialogs/FormBrowse.cs
Check for later version updates only.
We already know it matched so no need to check the string.
Fix compare.
async is a keyword.
Merge pull request #1801 from vbjay/master

Check for later version updates only
Merge pull request #1802 from vbjay/FixBuildErrors

Fix build error
Merge remote-tracking branch 'gitextensions/master' into BuildServerIntegration
Make settings thread safe.
Merge remote-tracking branch 'gitextensions/master' into BuildServerIntegration