making modals responsive

[RamRamez]

making modals responsive:

Change Network Popup Insufficient Funds Popup Incomplete Profile Popup

[divine-comedian]

checking this out on next.giveth.io testing mentioned modals on screen resolutions for tablets and mobile

there's an issue #579 that is preventing me from testing the incomplete profile modal responsiveness

[mateodaza]

@divine-comedian not blocked anymore I think

[divine-comedian]

nice! this looks good -

I also tested all the modals on tablet size and they came out fine