Possible XP Bar improvements

[Hubcapp]

as said in #60

• Ability to change XP progress bar between Level & Goal mode (currently stuck in Level mode, but could add another right-click menu option for this)
• Ability to change colour of XP progress bar to user's favourite colour, or depending on percent progress
• Could offer per-account preferred skill pin
• Could maybe space the right-click menu out a bit more
• Maybe if an XP Level goal ends up being a round Level (e.g. 70.0), it should just say 70 instead of 70.0
• Indicate how long the session has elapsed
• Option to permanently stick the hover-menu somewhere on screen (top right corner while interfaces are closed?)
• Make sure not to reset entire XP session on log out
• Hours/Minutes to next level / goal
• play Level Advance sound if reaching goal & goal level is not already on a level boundary
• Can also put green message "Congratulations, you reached xxxxx XP!"

but also

• Add menu option to change shown skill without having to gain XP in it. The menu option will do nothing except inform the user they can click on the skill names in the stats menu in order to set that as the active skill.