v3.5.0-alpha2

Pre-release for testing, not production ready!

Bugfix: Fixed "ValueError: could not convert string to float" in forecast, introduced in GH-191
Bugfix: Added missing nl.conf in install.py GH-221
Bugfix: Fixed Gauge tiles daily reset (via MQTT)
Bugfix: year-%Y.html.tmpl fails when changing group_speed to knots in weewx.conf GH-239
Bugfix: Translation Footer Text 'This station is controlled by...' GH-238
Bugfix: Fix page title in dwd.html.tmpl GH-246
Bugfix: Fix page title in externals.html.tmpl GH-244
Open Webcam Links/Stat Tile links in a Modal GH-220
Bugfix: Max Rain Rate Does Not Reset GH-224
Added MQTT connection with username/password GH-225
Added finnish translation GH-230
Added "Precipitation detail" on forecast display (show rain/snow separately) GH-231
Allow to add custom content to front page via custom templates GH-217
Updated windGust display in forecast table GH-240
Updated sorting of min/max graphs in the temp_min_max_avg graph GH-247
Added new property for charts: legendPosition - Change legend position GH-228
Added option to set default theme (light/dark/auto) GH-241

Full Changelog: v3.5.0-alpha1...v3.5.0-alpha2