Improving all side of app

TODO.md

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+# TODO
+
+- [ ] Implement git style versioning for: synthetic variable, panels, control logic
+- [ ] Implement configuration manager:
+  - configuration is a set of signals (that can be organized in group and subgroup) that are used to configure a system or a sub system
+  - with configuration manager user should be able to:
+    - Define and manage configuration sets: delete (keep server side copy of deleted config), create (specifying default to parameters, mandatory, optional etc), edit (with versioning git style) and compare set
+      - user can fork an existing config instance to create a new one
+      - user can compare two instances: show unified diff or side by side diff
+      - etc...
+    - Create, delete (keep server cache), edit (git style versioning) and compare configuration instances: meaning set actual value to a configuration set
+      - user can fork an existing config instance to create a new one
+      - user can compare two instances: show unified diff or side by side diff
+      - etc...
+- [ ] Implement admin pane: create / manage groups, set users permits, manage auditors etc
+- [ ] Implement new datasources:
+  - [ ] modbus tcp
+  - [ ] scpi tcp
+- [ ] Improve UX:
+  - [ ] Synthetic editor:
+    - color code the node link by type
+    - hover on a block in error should show the reason
+    - add proper array functionality
+    - add shortcut to add Signals (S) and nodes (N) with HUD
+  - [ ] Panels:
+    - in view mode the widgets should have no border/bg but blend with background
+    - add widgets such
+- [ ] Implement proper distributed server side nodes to balance load and have redundancy (if a node is not available anymore all its clients migrate seamelessly to another)