bots UI: Display message for empty 'Active/Inactive bots' tab.
bots UI: Display message for empty 'Active/Inactive bots' tab.

Add a line of text stating that there are no active or inactive bots.

This is for better understanding of the user, as blank screen that
used to appear in case of no bots being present might seem broken
to some.

Tweaked by tabbott to improve the English.

punchagan/zulip,zulip/zulip,eeshangarg/zulip,timabbott/zulip,vaidap/zulip,hackerkid/zulip,eeshangarg/zulip,rht/zulip,punchagan/zulip,eeshangarg/zulip,brainwane/zulip,amanharitsh123/zulip,synicalsyntax/zulip,amanharitsh123/zulip,hackerkid/zulip,kou/zulip,Galexrt/zulip,rishig/zulip,brainwane/zulip,mahim97/zulip,tommyip/zulip,rishig/zulip,synicalsyntax/zulip,brockwhittaker/zulip,dhcrzf/zulip,jackrzhang/zulip,hackerkid/zulip,verma-varsha/zulip,Galexrt/zulip,brockwhittaker/zulip,jackrzhang/zulip,synicalsyntax/zulip,hackerkid/zulip,jackrzhang/zulip,tommyip/zulip,timabbott/zulip,amanharitsh123/zulip,brainwane/zulip,rht/zulip,vaidap/zulip,eeshangarg/zulip,vabs22/zulip,brockwhittaker/zulip,kou/zulip,showell/zulip,eeshangarg/zulip,synicalsyntax/zulip,showell/zulip,rishig/zulip,Galexrt/zulip,brainwane/zulip,hackerkid/zulip,timabbott/zulip,zulip/zulip,verma-varsha/zulip,verma-varsha/zulip,vabs22/zulip,amanharitsh123/zulip,jackrzhang/zulip,eeshangarg/zulip,mahim97/zulip,zulip/zulip,timabbott/zulip,kou/zulip,hackerkid/zulip,zulip/zulip,jackrzhang/zulip,tommyip/zulip,kou/zulip,timabbott/zulip,brockwhittaker/zulip,vabs22/zulip,rishig/zulip,rishig/zulip,vaidap/zulip,kou/zulip,vabs22/zulip,zulip/zulip,amanharitsh123/zulip,tommyip/zulip,rht/zulip,showell/zulip,shubhamdhama/zulip,rht/zulip,punchagan/zulip,brainwane/zulip,rishig/zulip,rht/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,dhcrzf/zulip,zulip/zulip,verma-varsha/zulip,brockwhittaker/zulip,andersk/zulip,shubhamdhama/zulip,dhcrzf/zulip,brainwane/zulip,andersk/zulip,andersk/zulip,mahim97/zulip,synicalsyntax/zulip,dhcrzf/zulip,punchagan/zulip,Galexrt/zulip,mahim97/zulip,rht/zulip,Galexrt/zulip,vaidap/zulip,Galexrt/zulip,mahim97/zulip,tommyip/zulip,zulip/zulip,jackrzhang/zulip,dhcrzf/zulip,verma-varsha/zulip,showell/zulip,andersk/zulip,kou/zulip,shubhamdhama/zulip,vabs22/zulip,andersk/zulip,eeshangarg/zulip,punchagan/zulip,timabbott/zulip,Galexrt/zulip,showell/zulip,synicalsyntax/zulip,verma-varsha/zulip,punchagan/zulip,andersk/zulip,timabbott/zulip,shubhamdhama/zulip,rishig/zulip,showell/zulip,tommyip/zulip,rht/zulip,synicalsyntax/zulip,dhcrzf/zulip,vaidap/zulip,jackrzhang/zulip,dhcrzf/zulip,tommyip/zulip,brockwhittaker/zulip,andersk/zulip,vabs22/zulip,shubhamdhama/zulip,amanharitsh123/zulip,mahim97/zulip,vaidap/zulip,shubhamdhama/zulip,shubhamdhama/zulip,showell/zulip,brainwane/zulip