Nomad-camels

Major Features:

- Added an API web server. The homepage `http:\\localhost:<PORT>` gives you an overview of the available API calls and how to use them. You need to create an API key in the settings to be able to use most of the API calls. You can get a list of the available protocols you can execute with `GET /protocols` and run a specific protocol by using `POST /protocols/{protocol_name}` For more information check the documentation.
- Added a Watchdog feature to monitor certain values and execute operations when their condition is met.

Features:
- The `Execute Python Files` step passes the current value of variables passed to the script if no value is entered in the `value` field.
- "Shared" scope now possible in NOMAD sample selection
- Added more metadata to instruments in the data

Changes:
- Variable signal is now saved as group instead of dataset
- Can now read variables also without channels
- moved databroker catalog loading to import thread, should speed up starting

Fixes:
- Can now save variables with non-scalar size
- x-y plot now working with array-data again
- Multiple occurances of same protocol in tab-dictionary in save-json removed
- Pause would trigger unsubscribe of run-router for live data saving, now moved so it does not happen
- List-plot now shows again on new data
- Fixed a bug that would not allow extension-users to show up in data
- Fixed bug where a custom function signal that does not use force-sequential would not work
- Fixed bug that prevented fits from being displayed if the fit had many variables
- Number of databroker files setting never did anything, now it does
- Would upload wrong file to NOMAD if always new file

Features:
- Included the protocol's json used by the configuration in CAMELS into the data file
- Added functionality to replace loopsteps (instead of delete + add a new one)
- Included exception handling for manual control threads and allow for restarting them on error
- Added a progress bar functionality for the wait-step
- Added conditional waiting to the wait-step
- More info on python file step in protocol overview

Fixes:
- Cannot move protocols or manual controls to empty tab containing the "+" button anymore
- If instrument instantiation fails, only the actual error should now be raised
- Improved thread stability of stage control
- plots that were once closed now behave correctly, not throwing an error on closing again and can be closed by the close plots button
- Read Channels with the same channels but different state of reading variables now work
- Search bar of menu of editable boxes now appears at the top instead of bottom
- cannot display empty menus for insert-variables anymore --> search does not break menu anymore

Features:
- added NOMAD metadata to NOMAD samples

Fixes:
- For loop for which no distance was ever defined was broken, now fixed
- Fixed bug that prevented the app from starting when no tabs were used before
- Fixed issue with dots in path

Features:
- Data can now be exported to hdf5 during the measurement. This should remove long waiting times after running protocols with lots of data.
- Added a filter functionality to the right-click menu when setting channels or variables. This filters all available channels, variables or functions by the string that is entered.
- Added the `Execute Python File` loop step. This allows the user to specify a Python file and a Python environment to run the file with. The environment can either be the same as the one running CAMELS (default), a different already existing one, or is created dynamically by giving it the required packages and versions. The Python file can return (realized by printing) a dictionary with key value pairs. To read these, give the name of the key in the `Values returned by the Python file` list.
- Added a tab that allows you to add new tabs simply by clicking it.
- Point Distance can now be used for For-loops.

Changes:
- Running a protocol with a subprotocol also builds the subprotocol now. This makes it easier to change sub-protocols for more complex measurement routines.
- start-min-max-stop sweeps in a for loop now behave differently, the number of points is now the total number of points, not the number between min and max

Fixes:
- Description fields now change their size dynamically.
- Filtering the channels by name does not break if no matches were found.
- Filtering Set Channels now does not reset the value if the channel does not match the query.
- Fixed the hide/show information when installing instruments

Features:
- parsing now understands physical constants with `const.<constant_name>` by using `scipy.constants` as `const`

Changes:
- Now displaying errors together with fit values

Fixes:
- Too few characters were allowed in plot labels, now most characters are allowed again
- Failed fits do not throw an error that crashes the protocol anymore
- Title and icon of plot windows

Features:
- Protocols and manual controls are now sortable into tabs!
- Protocols can now be run in a queue
- added possibility to force sequential on/off for single channels
- Plots are now done with pyqtgraph, improving interactivity and performance

Fixes:
- Plots being placed somewhere should now not kill the program anymore