Implement "advanced configuration" dialog (fixes #2010)

gui/assets/lang/lang-en.json

@@ -10,6 +10,8 @@
    "Add new folder?": "Add new folder?",
    "Address": "Address",
    "Addresses": "Addresses",
+   "Advanced": "Advanced",
+   "Advanced Configuration": "Advanced Configuration",
    "All Data": "All Data",
    "Allow Anonymous Usage Reporting?": "Allow Anonymous Usage Reporting?",
    "Alphabetic": "Alphabetic",
@@ -17,6 +19,7 @@
    "Anonymous Usage Reporting": "Anonymous Usage Reporting",
    "Any devices configured on an introducer device will be added to this device as well.": "Any devices configured on an introducer device will be added to this device as well.",
    "Automatic upgrades": "Automatic upgrades",
+   "Be careful!": "Be careful!",
    "Bugs": "Bugs",
    "CPU Utilization": "CPU Utilization",
    "Changelog": "Changelog",
@@ -57,10 +60,12 @@
    "Files are moved to .stversions folder when replaced or deleted by Syncthing.": "Files are moved to .stversions folder when replaced or deleted by Syncthing.",
    "Files are moved to date stamped versions in a .stversions folder when replaced or deleted by Syncthing.": "Files are moved to date stamped versions in a .stversions folder when replaced or deleted by Syncthing.",
    "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.": "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.",
+   "Folder": "Folder",
    "Folder ID": "Folder ID",
    "Folder Master": "Folder Master",
    "Folder Path": "Folder Path",
    "Folders": "Folders",
+   "GUI": "GUI",
    "GUI Authentication Password": "GUI Authentication Password",
    "GUI Authentication User": "GUI Authentication User",
    "GUI Listen Addresses": "GUI Listen Addresses",
@@ -73,6 +78,7 @@
    "Ignore Patterns": "Ignore Patterns",
    "Ignore Permissions": "Ignore Permissions",
    "Incoming Rate Limit (KiB/s)": "Incoming Rate Limit (KiB/s)",
+   "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Incorrect configuration may damage your folder contents and render Syncthing inoperable.",
    "Introducer": "Introducer",
    "Inversion of the given condition (i.e. do not exclude)": "Inversion of the given condition (i.e. do not exclude)",
    "Keep Versions": "Keep Versions",
@@ -98,6 +104,7 @@
    "OK": "OK",
    "Off": "Off",
    "Oldest First": "Oldest First",
+   "Options": "Options",
    "Out of Sync": "Out of Sync",
    "Out of Sync Items": "Out of Sync Items",
    "Outgoing Rate Limit (KiB/s)": "Outgoing Rate Limit (KiB/s)",