Merge pull request #869 from quintel/new_co2_dashboard_item

Added queries for new CO2 dashboard item.
Updated SER 2023 preset scenario and made is show up in the start-menu
Fixed the colons that should have been '='-signs
Updated SER 2020 and 2023 scenario's to match 2012 dataset
Merge pull request #871 from quintel/ser_scenario_update

Updated SER 2020 and 2023 scenario's to match 2012 dataset
Added terrified_biomass_pellets to the Primary demand Mekko.
Added terrified_biomass_pellets to the Primary demand Mekko for all sectors.
Merge pull request #872 from quintel/primary_demand_mekko

Primary demand mekko
Connected households_water_heater_heatpump_ground_water_electricity to the environment_earth_ambient_heat. Fixes https://github.com/quintel/etengine/issues/719
Merge pull request #873 from quintel/heatpump_link

heatpump link
Made own of the energy sector use static by setting its edge to constant and adding it to the preset demand group
Merge pull request #874 from quintel/static_own_use

static own use
Reconsidered the technology shares for space heating and hot water in DE/2012.
Merge pull request #876 from quintel/DE_heat_pumps

Reconsidered the technology shares for space heating and hot water in DE/2012.
Remove extra unused heat node

Removes "energy heat remainder from heat network unused steam hot
water" in favour of connecting extra agriculture and industry heat
directly to the "energy heat network steam hot water" node.
Removed remaining 'unused heat' nodes
Removed useful_demand and useful_demand_heat_cold from the groups for energy_heat_network_unused_steam_hot_water. The fact that this overflow was part of these groups made no sense. For the primary demand calculation, it is needed that the node stays in the final_demand_group because the primary demand of the CHPs in agriculture and industry is only due to the steam_hot_water that is actually used in the sectors.
Merge pull request #877 from quintel/unused-heat

Unused heat
Removed three obsolete carriers from query.
Renamed bio-residues for firing to woody biomass.