Relax limits on size and update frequency
Relax limits on size and update frequency

The current size and frequency limits appear arbitrary. Some users might want a higher update frequency and/or larger size of the plot. This patch grants them. 100ms is the new lower bound. I understand that lower values might eat up the CPU. The user should realize this latest by looking at the plot itself..
stefonarch/lxqt-panel,DrTobe/lxqt-panel,rbazaud/lxqt-panel,musarder/lxqt-panel,jeremywh7/lxqt-panel,hagabaka/lxqt-panel,zvacet/lxqt-panel,hagabaka/lxqt-panel,npmiller/lxqt-panel,ThomasVie/lxqt-panel-de,rysiowski/lxqt-panel,pmattern/lxqt-panel,zjes/lxqt-panel,Ilya87/lxqt-panel,lxde/lxqt-panel,Ilya87/lxqt-panel,jeremywh7/lxqt-panel,DrTobe/lxqt-panel,pmattern/lxqt-panel,rysiowski/lxqt-panel,stefonarch/lxqt-panel,zjes/lxqt-panel,rbazaud/lxqt-panel,ThomasVie/lxqt-panel-de,cferr/lxqt-panel,zvacet/lxqt-panel,cferr/lxqt-panel,lxde/lxqt-panel,jubalh/lxqt-panel,npmiller/lxqt-panel,musarder/lxqt-panel,jubalh/lxqt-panel,stefonarch/lxqt-panel