Fix metabo tools panel

[lldelisle]

See #652
I need an approval from people from Metabolomics.
I put back here the json I used to use consistent tool_panel_section_label:

{
    "ethevenot/transformation": "Metabolomics",
    "ethevenot/univariate": "Metabolomics",
    "ethevenot/multivariate": "Metabolomics",
    "ethevenot/biosigner": "Metabolomics",
    "ethevenot/heatmap": "Metabolomics",
    "prog/lcmsmatching": "Metabolomics",
    "galaxyp/idpquery": "Convert Formats",
    "galaxyp/msconvert": "Convert Formats",
    "galaxyp/msms_extractor": "Convert Formats",
    "galaxyp/thermo_raw_file_converter": "Convert Formats",
    "lecorguille/anova": "Statistics"
}

[lldelisle]

@lecorguille would you mind to tell me which panel should these tools go in?
Thanks

[bgruening]

@foellmelanie told me its fine.

I will also fix the currently installed tools and deploy them. Thanks.