[feature] screensaver disabled only if video is playing (linux)

[arrowgent]

_Important note

Please check other open and closed issues for a similar feature request before proposing a new one.
Also please leave all headers except this one in the issue, so that it is clear what belongs where._
yes none found

_Is your feature request related to a usage problem (not a bug)? Please describe.

Please describe clear and concise of what the problem is. Ex. I'm always frustrated when [...]_
screensaver disable is active if no video is playing or active

_Describe the solution you'd like to see implemented

Please give a clear and concise description of what you want to happen._
if video is playing then disable screensaver
if videos STOPS or no video page is active then screensaver/powermanagement is allowed

~~ v0.12 & v0.13
more deliberate testing required

[arrowgent]

only contents i find of "power" ie: screensaver, powersaveblocker

FreeTube/src/renderer/components/ft-video-player/ft-video-player.js

Line 32 in 754a4a8

if (this.usingElectron && this.powerSaveBlocker !== null) {

FreeTube/src/main/index.js

Line 3 in 1c57c2b

ipcMain, powerSaveBlocker, screen, shell

FreeTube/src/main/index.js

Line 443 in 1c57c2b

ipcMain.on('stopPowerSaveBlocker', (_, id) => {

ah, "power" "power management"
#279

[DnickC]

I'm on linux mint 19 and latest version of freetube.
I notice powersaving switching on and off works as expected until a video is started and while still playing I navigate back to subscriptions or any other page. After this power management stays disabled until the window is closed.